diff --git a/.rubocop.yml b/.rubocop.yml
index c175484..2535525 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -5,10 +5,12 @@ AllCops:
     - 'vendor/**/*'
 Style/Documentation:
   Enabled: false
-Style/FrozenStringLiteralComment:
-  Enabled: false
-Style/NumericPredicate:
-  Enabled: false
+Metrics/BlockLength:
+  Exclude:
+   - 'spec/**/*'
+Metrics/LineLength:
+  Exclude:
+   - 'spec/**/*'
 Lint/UnifiedInteger:
   Enabled: false
 Style/PercentLiteralDelimiters:
diff --git a/.travis.yml b/.travis.yml
index 3b54adf..bb6f1be 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,4 @@
+
 language: ruby
 sudo: false
 cache: bundler
diff --git a/Gemfile b/Gemfile
index f1d387a..bd2d86f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source 'https://rubygems.org'
 
 # Specify your gem's dependencies in candy_check.gemspec
diff --git a/Rakefile b/Rakefile
old mode 100644
new mode 100755
index 58f146b..f89d26f
--- a/Rakefile
+++ b/Rakefile
@@ -1,4 +1,5 @@
 #!/usr/bin/env rake
+# frozen_string_literal: true
 
 require 'bundler/gem_tasks'
 require 'rake/testtask'
diff --git a/candy_check.gemspec b/candy_check.gemspec
index bf0a65a..cf4eecc 100644
--- a/candy_check.gemspec
+++ b/candy_check.gemspec
@@ -1,4 +1,5 @@
 # coding: utf-8
+# frozen_string_literal: true
 
 lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
diff --git a/lib/candy_check.rb b/lib/candy_check.rb
index ac8ff9c..bcfac86 100644
--- a/lib/candy_check.rb
+++ b/lib/candy_check.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'candy_check/version'
 require 'candy_check/utils'
 require 'candy_check/app_store'
diff --git a/lib/candy_check/app_store.rb b/lib/candy_check/app_store.rb
index e4f1586..8f15933 100644
--- a/lib/candy_check/app_store.rb
+++ b/lib/candy_check/app_store.rb
@@ -1,9 +1,13 @@
+# frozen_string_literal: true
+
 require 'candy_check/app_store/client'
 require 'candy_check/app_store/config'
 require 'candy_check/app_store/receipt'
 require 'candy_check/app_store/receipt_collection'
 require 'candy_check/app_store/verification'
 require 'candy_check/app_store/subscription_verification'
+require 'candy_check/app_store/full_subscription_verification'
+require 'candy_check/app_store/subscription_receipt'
 require 'candy_check/app_store/verification_failure'
 require 'candy_check/app_store/verifier'
 
diff --git a/lib/candy_check/app_store/client.rb b/lib/candy_check/app_store/client.rb
index a1b0bd0..5eba0c3 100644
--- a/lib/candy_check/app_store/client.rb
+++ b/lib/candy_check/app_store/client.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'multi_json'
 require 'net/http'
 
@@ -7,7 +9,7 @@ module AppStore
     # servers (either sandbox or production).
     class Client
       # Mimetype for JSON objects
-      JSON_MIME_TYPE = 'application/json'.freeze
+      JSON_MIME_TYPE = 'application/json'
 
       # Initialize a new client bound to an endpoint
       # @param endpoint_url [String]
diff --git a/lib/candy_check/app_store/config.rb b/lib/candy_check/app_store/config.rb
index 2f70c08..329bfad 100644
--- a/lib/candy_check/app_store/config.rb
+++ b/lib/candy_check/app_store/config.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module AppStore
     # Configure the verifier
diff --git a/lib/candy_check/app_store/full_subscription_verification.rb b/lib/candy_check/app_store/full_subscription_verification.rb
new file mode 100644
index 0000000..fbb587b
--- /dev/null
+++ b/lib/candy_check/app_store/full_subscription_verification.rb
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+module CandyCheck
+  module AppStore
+    # Verifies a receipt and latest_receipt_info block
+    # The call return either a {SubscriptionReceipt} or a {VerificationFailure}
+    class FullSubscriptionVerification < CandyCheck::AppStore::Verification
+      # Performs the verification against the remote server
+      # @return [SubscriptionReceipt] if successful
+      # @return [VerificationFailure] otherwise
+      def call!
+        verify!
+        return VerificationFailure.fetch(@response['status']) unless valid?
+        subscription_receipt
+      end
+
+      private
+
+      def subscription_receipt
+        receipt = Receipt.new(@response['receipt'])
+        receipt_collection = ReceiptCollection.new(
+          @response['latest_receipt_info']
+        )
+
+        SubscriptionReceipt.new(receipt, receipt_collection)
+      end
+
+      def valid?
+        super && @response['latest_receipt_info']
+      end
+    end
+  end
+end
diff --git a/lib/candy_check/app_store/receipt.rb b/lib/candy_check/app_store/receipt.rb
index 423723d..353e22b 100644
--- a/lib/candy_check/app_store/receipt.rb
+++ b/lib/candy_check/app_store/receipt.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module AppStore
     # Describes a successful response from the AppStore verification server
diff --git a/lib/candy_check/app_store/receipt_collection.rb b/lib/candy_check/app_store/receipt_collection.rb
index bcff3a3..054f653 100644
--- a/lib/candy_check/app_store/receipt_collection.rb
+++ b/lib/candy_check/app_store/receipt_collection.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module AppStore
     # Store multiple {Receipt}s in order to perform collective operation on them
diff --git a/lib/candy_check/app_store/subscription_receipt.rb b/lib/candy_check/app_store/subscription_receipt.rb
new file mode 100644
index 0000000..818d75f
--- /dev/null
+++ b/lib/candy_check/app_store/subscription_receipt.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+module CandyCheck
+  module AppStore
+    # Describes a successful response from the AppStore verification server
+    class SubscriptionReceipt
+      attr_reader :receipt, :receipt_collection
+
+      # Initializes a new instance
+      def initialize(receipt, receipt_collection)
+        @receipt = receipt
+        @receipt_collection = receipt_collection
+      end
+
+      def transactions
+        @receipt_collection.receipts
+      end
+
+      def valid?
+        @receipt.is_a?(CandyCheck::AppStore::Receipt) &&
+          @receipt_collection.is_a?(CandyCheck::AppStore::ReceiptCollection)
+      end
+    end
+  end
+end
diff --git a/lib/candy_check/app_store/subscription_verification.rb b/lib/candy_check/app_store/subscription_verification.rb
index 9663639..cce180b 100644
--- a/lib/candy_check/app_store/subscription_verification.rb
+++ b/lib/candy_check/app_store/subscription_verification.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module AppStore
     # Verifies a latest_receipt_info block against a verification server.
diff --git a/lib/candy_check/app_store/verification.rb b/lib/candy_check/app_store/verification.rb
index ed03727..cce8df5 100644
--- a/lib/candy_check/app_store/verification.rb
+++ b/lib/candy_check/app_store/verification.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module AppStore
     # Verifies a receipt block against a verification server.
@@ -37,8 +39,16 @@ def call!
 
       private
 
+      def response_status_ok?
+        @response && @response['status'] == STATUS_OK
+      end
+
+      def response_has_receipt?
+        @response && @response['receipt']
+      end
+
       def valid?
-        @response && @response['status'] == STATUS_OK && @response['receipt']
+        response_status_ok? && response_has_receipt?
       end
 
       def verify!
diff --git a/lib/candy_check/app_store/verification_failure.rb b/lib/candy_check/app_store/verification_failure.rb
index abc58cb..d1e0200 100644
--- a/lib/candy_check/app_store/verification_failure.rb
+++ b/lib/candy_check/app_store/verification_failure.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module AppStore
     # Represents a failing call against the verification server
@@ -64,6 +66,8 @@ def freeze!
       add 21_008, 'This receipt is from the production environment, but it' \
                   ' was sent to the test environment for verification.' \
                   ' Send it to the production environment instead.'
+      add 21_009, 'There was a problem with the (internal) receipt validation' \
+                 ' process. Please try again.'
       freeze!
     end
   end
diff --git a/lib/candy_check/app_store/verifier.rb b/lib/candy_check/app_store/verifier.rb
index 1ed9099..c69a0d8 100644
--- a/lib/candy_check/app_store/verifier.rb
+++ b/lib/candy_check/app_store/verifier.rb
@@ -1,12 +1,14 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module AppStore
     # Verifies receipts against the verification servers.
     # The call return either an {Receipt} or a {VerificationFailure}
     class Verifier
       # HTTPS endpoint for production receipts
-      PRODUCTION_ENDPOINT = 'https://buy.itunes.apple.com/verifyReceipt'.freeze
+      PRODUCTION_ENDPOINT = 'https://buy.itunes.apple.com/verifyReceipt'
       # HTTPS endpoint for sandbox receipts
-      SANDBOX_ENDPOINT = 'https://sandbox.itunes.apple.com/verifyReceipt'.freeze
+      SANDBOX_ENDPOINT = 'https://sandbox.itunes.apple.com/verifyReceipt'
       # Status code from production endpoint when receiving a sandbox
       # receipt which occurs during the app's review process
       REDIRECT_TO_SANDBOX_CODE = 21_007
@@ -44,6 +46,16 @@ def verify_subscription(receipt_data, secret = nil)
         fetch_receipt_information(receipt_data, secret)
       end
 
+      # Calls a subscription verification for the given input
+      # @param receipt_data [String] the raw data to be verified
+      # @param secret [string] the optional shared secret
+      # @return [SubscriptionReceipt] if successful
+      # @return [VerificationFailure] otherwise
+      def verify_subscription_with_full_response(receipt_data, secret = nil)
+        @verifier = FullSubscriptionVerification
+        fetch_receipt_information(receipt_data, secret)
+      end
+
       private
 
       def fetch_receipt_information(receipt_data, secret = nil)
diff --git a/lib/candy_check/cli.rb b/lib/candy_check/cli.rb
index 1e44346..eaed795 100644
--- a/lib/candy_check/cli.rb
+++ b/lib/candy_check/cli.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'candy_check/cli/app'
 require 'candy_check/cli/commands'
 require 'candy_check/cli/out'
diff --git a/lib/candy_check/cli/app.rb b/lib/candy_check/cli/app.rb
index 6ee1ec2..cdab336 100644
--- a/lib/candy_check/cli/app.rb
+++ b/lib/candy_check/cli/app.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'thor'
 
 module CandyCheck
diff --git a/lib/candy_check/cli/commands.rb b/lib/candy_check/cli/commands.rb
index 39907bc..c41f1fc 100644
--- a/lib/candy_check/cli/commands.rb
+++ b/lib/candy_check/cli/commands.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'candy_check/cli/commands/base'
 require 'candy_check/cli/commands/app_store'
 require 'candy_check/cli/commands/play_store'
diff --git a/lib/candy_check/cli/commands/app_store.rb b/lib/candy_check/cli/commands/app_store.rb
index 12d43a4..83da955 100644
--- a/lib/candy_check/cli/commands/app_store.rb
+++ b/lib/candy_check/cli/commands/app_store.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module CLI
     module Commands
diff --git a/lib/candy_check/cli/commands/base.rb b/lib/candy_check/cli/commands/base.rb
index 4f7e647..deb73ee 100644
--- a/lib/candy_check/cli/commands/base.rb
+++ b/lib/candy_check/cli/commands/base.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module CLI
     module Commands
diff --git a/lib/candy_check/cli/commands/play_store.rb b/lib/candy_check/cli/commands/play_store.rb
index 3ea8b41..610905c 100644
--- a/lib/candy_check/cli/commands/play_store.rb
+++ b/lib/candy_check/cli/commands/play_store.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module CLI
     module Commands
diff --git a/lib/candy_check/cli/commands/version.rb b/lib/candy_check/cli/commands/version.rb
index 464dd1c..f22b892 100644
--- a/lib/candy_check/cli/commands/version.rb
+++ b/lib/candy_check/cli/commands/version.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module CLI
     module Commands
diff --git a/lib/candy_check/cli/out.rb b/lib/candy_check/cli/out.rb
index 24aeb38..03c8658 100644
--- a/lib/candy_check/cli/out.rb
+++ b/lib/candy_check/cli/out.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'pp'
 
 module CandyCheck
diff --git a/lib/candy_check/play_store.rb b/lib/candy_check/play_store.rb
index 3f40dde..eb39a5f 100644
--- a/lib/candy_check/play_store.rb
+++ b/lib/candy_check/play_store.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'google/api_client'
 
 require 'candy_check/play_store/discovery_repository'
diff --git a/lib/candy_check/play_store/client.rb b/lib/candy_check/play_store/client.rb
index 6f6eedb..6406da9 100644
--- a/lib/candy_check/play_store/client.rb
+++ b/lib/candy_check/play_store/client.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module PlayStore
     # A client which uses the official Google API SDK to authenticate
@@ -15,13 +17,13 @@ class Client
       class DiscoveryError < RuntimeError; end
 
       # API endpoint
-      API_URL      = 'https://accounts.google.com/o/oauth2/token'.freeze
+      API_URL      = 'https://accounts.google.com/o/oauth2/token'
       # API scope for Android services
-      API_SCOPE    = 'https://www.googleapis.com/auth/androidpublisher'.freeze
+      API_SCOPE    = 'https://www.googleapis.com/auth/androidpublisher'
       # API discovery namespace
-      API_DISCOVER = 'androidpublisher'.freeze
+      API_DISCOVER = 'androidpublisher'
       # API version
-      API_VERSION  = 'v2'.freeze
+      API_VERSION  = 'v2'
 
       # Initializes a client using a configuration.
       # @param config [ClientConfig]
diff --git a/lib/candy_check/play_store/config.rb b/lib/candy_check/play_store/config.rb
index 649c755..9ad5c3f 100644
--- a/lib/candy_check/play_store/config.rb
+++ b/lib/candy_check/play_store/config.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module PlayStore
     # Configure the usage of the official Google API SDK client
diff --git a/lib/candy_check/play_store/discovery_repository.rb b/lib/candy_check/play_store/discovery_repository.rb
index d1437b0..7d8d0d0 100644
--- a/lib/candy_check/play_store/discovery_repository.rb
+++ b/lib/candy_check/play_store/discovery_repository.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module PlayStore
     # A file-based repository to cache a local copy of the Google API
diff --git a/lib/candy_check/play_store/receipt.rb b/lib/candy_check/play_store/receipt.rb
index 14d25b3..c0f2864 100644
--- a/lib/candy_check/play_store/receipt.rb
+++ b/lib/candy_check/play_store/receipt.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module PlayStore
     # Describes a successful response from the Google verification server
diff --git a/lib/candy_check/play_store/subscription.rb b/lib/candy_check/play_store/subscription.rb
index 8398d00..a3239b6 100644
--- a/lib/candy_check/play_store/subscription.rb
+++ b/lib/candy_check/play_store/subscription.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module PlayStore
     # Describes a successfully validated subscription
@@ -25,17 +27,18 @@ def initialize(attributes)
 
       # Check if the expiration date is passed
       # @return [bool]
+      # rubocop:disable Style/NumericPredicate
       def expired?
         overdue_days > 0
       end
+      # rubocop:enable Style/NumericPredicate
 
       # Check if in trial. This is actually not given by Google, but we assume
       # that it is a trial going on if the paid amount is 0 and
       # renewal is activated.
       # @return [bool]
       def trial?
-        price_is_zero = price_amount_micros == 0
-        price_is_zero && payment_received?
+        price_amount_micros.zero? && payment_received?
       end
 
       # see if payment is ok
diff --git a/lib/candy_check/play_store/subscription_verification.rb b/lib/candy_check/play_store/subscription_verification.rb
index 3ecb56a..85ecc0a 100644
--- a/lib/candy_check/play_store/subscription_verification.rb
+++ b/lib/candy_check/play_store/subscription_verification.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module PlayStore
     # Verifies a purchase token against the Google API
diff --git a/lib/candy_check/play_store/verification.rb b/lib/candy_check/play_store/verification.rb
index 4fe60de..fc5f961 100644
--- a/lib/candy_check/play_store/verification.rb
+++ b/lib/candy_check/play_store/verification.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module PlayStore
     # Verifies a purchase token against the Google API
diff --git a/lib/candy_check/play_store/verification_failure.rb b/lib/candy_check/play_store/verification_failure.rb
index af89f88..5c44e41 100644
--- a/lib/candy_check/play_store/verification_failure.rb
+++ b/lib/candy_check/play_store/verification_failure.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module PlayStore
     # Represents a failing call against the Google API server
diff --git a/lib/candy_check/play_store/verifier.rb b/lib/candy_check/play_store/verifier.rb
index 0e034c6..9793358 100644
--- a/lib/candy_check/play_store/verifier.rb
+++ b/lib/candy_check/play_store/verifier.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module PlayStore
     # Verifies purchase tokens against the Google API.
diff --git a/lib/candy_check/utils.rb b/lib/candy_check/utils.rb
index f14f370..3db8007 100644
--- a/lib/candy_check/utils.rb
+++ b/lib/candy_check/utils.rb
@@ -1,2 +1,4 @@
+# frozen_string_literal: true
+
 require 'candy_check/utils/attribute_reader'
 require 'candy_check/utils/config'
diff --git a/lib/candy_check/utils/attribute_reader.rb b/lib/candy_check/utils/attribute_reader.rb
index ac5de3a..f02767d 100644
--- a/lib/candy_check/utils/attribute_reader.rb
+++ b/lib/candy_check/utils/attribute_reader.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'date'
 
 module CandyCheck
diff --git a/lib/candy_check/utils/config.rb b/lib/candy_check/utils/config.rb
index 09e8794..b68297e 100644
--- a/lib/candy_check/utils/config.rb
+++ b/lib/candy_check/utils/config.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module CandyCheck
   module Utils
     # Very basic base implementation to store and validate a configuration
diff --git a/lib/candy_check/version.rb b/lib/candy_check/version.rb
index 5fd0163..0a495b1 100644
--- a/lib/candy_check/version.rb
+++ b/lib/candy_check/version.rb
@@ -1,4 +1,6 @@
+# frozen_string_literal: true
+
 module CandyCheck
   # The current gem's version
-  VERSION = '0.1.1'.freeze
+  VERSION = '0.1.2'
 end
diff --git a/spec/app_store/client_spec.rb b/spec/app_store/client_spec.rb
index c89f48c..0e82e00 100644
--- a/spec/app_store/client_spec.rb
+++ b/spec/app_store/client_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::AppStore::Client do
diff --git a/spec/app_store/config_spec.rb b/spec/app_store/config_spec.rb
index a50702b..9ff8f69 100644
--- a/spec/app_store/config_spec.rb
+++ b/spec/app_store/config_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::AppStore::Config do
diff --git a/spec/app_store/full_subscription_verification_spec.rb b/spec/app_store/full_subscription_verification_spec.rb
new file mode 100644
index 0000000..6960ab7
--- /dev/null
+++ b/spec/app_store/full_subscription_verification_spec.rb
@@ -0,0 +1,109 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe CandyCheck::AppStore::FullSubscriptionVerification do
+  subject do
+    CandyCheck::AppStore::FullSubscriptionVerification.new(endpoint, data, secret)
+  end
+  let(:endpoint) { 'https://some.endpoint' }
+  let(:data)     { 'some_data'   }
+  let(:secret)   { 'some_secret' }
+
+  it 'returns a verification failure for status != 0' do
+    with_mocked_response('status' => 21_000) do |client, recorded|
+      result = subject.call!
+      client.receipt_data.must_equal data
+      client.secret.must_equal secret
+
+      recorded.first.must_equal [endpoint]
+
+      result.must_be_instance_of CandyCheck::AppStore::VerificationFailure
+      result.code.must_equal 21_000
+    end
+  end
+
+  it 'returns a verification failure when receipt is missing' do
+    with_mocked_response({}) do |client, recorded|
+      result = subject.call!
+      client.receipt_data.must_equal data
+      client.secret.must_equal secret
+
+      recorded.first.must_equal [endpoint]
+
+      result.must_be_instance_of CandyCheck::AppStore::VerificationFailure
+      result.code.must_equal(-1)
+    end
+  end
+
+  it 'returns a verification failure when status is 0 and receipt is missing' do
+    response = {
+      'status' => 0,
+      'latest_receipt_info' => [
+        { 'item_id' => 'some_id' },
+        { 'item_id' => 'some_other_id' }
+      ]
+    }
+    with_mocked_response(response) do
+      result = subject.call!
+      result.must_be_instance_of CandyCheck::AppStore::VerificationFailure
+      result.code.must_equal(0)
+    end
+  end
+
+  it 'returns a verification failure when status is 0 and latest_receipt_info is missing' do
+    response = {
+      'status' => 0,
+      'receipt' => { 'item_id' => 'some_id' }
+    }
+    with_mocked_response(response) do
+      result = subject.call!
+      result.must_be_instance_of CandyCheck::AppStore::VerificationFailure
+      result.code.must_equal(0)
+    end
+  end
+
+  it 'returns a struct containing a Receipt and a ReceiptCollection when status is 0 and receipt and latest_receipt_info is present' do
+    response = {
+      'status' => 0,
+      'receipt' => { 'item_id' => 'some_id' },
+      'latest_receipt_info' => [
+        { 'item_id' => 'some_id' },
+        { 'item_id' => 'some_other_id' }
+      ]
+    }
+    with_mocked_response(response) do
+      result = subject.call!
+      result.receipt_collection.must_be_instance_of CandyCheck::AppStore::ReceiptCollection
+      result.receipt_collection.receipts.must_be_instance_of Array
+      last = result.receipt_collection.receipts.last
+      last.must_be_instance_of CandyCheck::AppStore::Receipt
+      last.item_id.must_equal('some_other_id')
+      result.receipt.must_be_instance_of CandyCheck::AppStore::Receipt
+    end
+  end
+
+  private
+
+  DummyClient = Struct.new(:response) do
+    attr_reader :receipt_data, :secret
+
+    def verify(receipt_data, secret)
+      @receipt_data = receipt_data
+      @secret = secret
+      response
+    end
+  end
+
+  def with_mocked_response(response)
+    recorded = []
+    dummy    = DummyClient.new(response)
+    stub     = proc do |*args|
+      recorded << args
+      dummy
+    end
+    CandyCheck::AppStore::Client.stub :new, stub do
+      yield dummy, recorded
+    end
+  end
+end
diff --git a/spec/app_store/receipt_collection_spec.rb b/spec/app_store/receipt_collection_spec.rb
index 11af43b..77d4c59 100644
--- a/spec/app_store/receipt_collection_spec.rb
+++ b/spec/app_store/receipt_collection_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::AppStore::ReceiptCollection do
@@ -26,7 +28,7 @@
 
     it 'has positive overdue days' do
       overdue = subject.overdue_days
-      overdue.must_be_instance_of Fixnum
+      overdue.is_a?(Integer).must_be_true
       assert overdue > 0
     end
 
diff --git a/spec/app_store/receipt_spec.rb b/spec/app_store/receipt_spec.rb
index 2ebe025..273241a 100644
--- a/spec/app_store/receipt_spec.rb
+++ b/spec/app_store/receipt_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::AppStore::Receipt do
diff --git a/spec/app_store/subscription_verification_spec.rb b/spec/app_store/subscription_verification_spec.rb
index 2683eab..3e0623c 100644
--- a/spec/app_store/subscription_verification_spec.rb
+++ b/spec/app_store/subscription_verification_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::AppStore::SubscriptionVerification do
diff --git a/spec/app_store/verifcation_failure_spec.rb b/spec/app_store/verifcation_failure_spec.rb
index 800587b..a0293ce 100644
--- a/spec/app_store/verifcation_failure_spec.rb
+++ b/spec/app_store/verifcation_failure_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::AppStore::VerificationFailure do
diff --git a/spec/app_store/verification_spec.rb b/spec/app_store/verification_spec.rb
index c6b102e..e0132cb 100644
--- a/spec/app_store/verification_spec.rb
+++ b/spec/app_store/verification_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::AppStore::Verification do
diff --git a/spec/app_store/verifier_spec.rb b/spec/app_store/verifier_spec.rb
index 01a4ec8..df32ab5 100644
--- a/spec/app_store/verifier_spec.rb
+++ b/spec/app_store/verifier_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::AppStore::Verifier do
@@ -113,6 +115,38 @@
     end
   end
 
+  describe 'subscription' do
+    let(:environment) { :production }
+
+    it 'uses production endpoint without retry on success' do
+      with_mocked_verifier(receipt_collection) do
+        subject.verify_subscription_with_full_response(
+          data, secret
+        ).must_be_same_as receipt_collection
+        assert_recorded([production_endpoint, data, secret])
+      end
+    end
+
+    it 'only uses production endpoint for normal failures' do
+      failure = get_failure(21_000)
+      with_mocked_verifier(failure) do
+        subject.verify_subscription_with_full_response(data, secret).must_be_same_as failure
+        assert_recorded([production_endpoint, data, secret])
+      end
+    end
+
+    it 'retries production endpoint for redirect error' do
+      failure = get_failure(21_007)
+      with_mocked_verifier(failure, receipt) do
+        subject.verify_subscription_with_full_response(data, secret).must_be_same_as receipt
+        assert_recorded(
+          [production_endpoint, data, secret],
+          [sandbox_endpoint, data, secret]
+        )
+      end
+    end
+  end
+
   private
 
   def with_mocked_verifier(*results)
diff --git a/spec/candy_check_spec.rb b/spec/candy_check_spec.rb
index c5a0c6f..2b1c139 100644
--- a/spec/candy_check_spec.rb
+++ b/spec/candy_check_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck do
diff --git a/spec/cli/app_spec.rb b/spec/cli/app_spec.rb
index 7e81bbe..1e5580b 100644
--- a/spec/cli/app_spec.rb
+++ b/spec/cli/app_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::CLI::App do
diff --git a/spec/cli/commands/app_store_spec.rb b/spec/cli/commands/app_store_spec.rb
index 9cfdb89..092ed23 100644
--- a/spec/cli/commands/app_store_spec.rb
+++ b/spec/cli/commands/app_store_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::CLI::Commands::AppStore do
diff --git a/spec/cli/commands/play_store_spec.rb b/spec/cli/commands/play_store_spec.rb
index 6680f45..a1ee7d3 100644
--- a/spec/cli/commands/play_store_spec.rb
+++ b/spec/cli/commands/play_store_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::CLI::Commands::PlayStore do
diff --git a/spec/cli/commands/version_spec.rb b/spec/cli/commands/version_spec.rb
index b45a0e4..2941e34 100644
--- a/spec/cli/commands/version_spec.rb
+++ b/spec/cli/commands/version_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::CLI::Commands::Version do
diff --git a/spec/cli/out_spec.rb b/spec/cli/out_spec.rb
index bf85b08..ec4c396 100644
--- a/spec/cli/out_spec.rb
+++ b/spec/cli/out_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::CLI::Out do
diff --git a/spec/play_store/client_spec.rb b/spec/play_store/client_spec.rb
index f5b97a2..9f3b4b6 100644
--- a/spec/play_store/client_spec.rb
+++ b/spec/play_store/client_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::PlayStore::Client do
diff --git a/spec/play_store/config_spec.rb b/spec/play_store/config_spec.rb
index b4c43a4..15948a7 100644
--- a/spec/play_store/config_spec.rb
+++ b/spec/play_store/config_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::PlayStore::Config do
diff --git a/spec/play_store/discovery_respository_spec.rb b/spec/play_store/discovery_respository_spec.rb
index c30f40a..2a337e4 100644
--- a/spec/play_store/discovery_respository_spec.rb
+++ b/spec/play_store/discovery_respository_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::PlayStore::DiscoveryRepository do
diff --git a/spec/play_store/receipt_spec.rb b/spec/play_store/receipt_spec.rb
index 54d2ff0..55e5e36 100644
--- a/spec/play_store/receipt_spec.rb
+++ b/spec/play_store/receipt_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::PlayStore::Receipt do
diff --git a/spec/play_store/subscription_spec.rb b/spec/play_store/subscription_spec.rb
index 0b210db..6850874 100644
--- a/spec/play_store/subscription_spec.rb
+++ b/spec/play_store/subscription_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::PlayStore::Subscription do
@@ -46,11 +48,11 @@
     end
 
     it 'returns the start_time_millis' do
-      subject.start_time_millis.must_equal 145_954_011_324_4
+      subject.start_time_millis.must_equal 1_459_540_113_244
     end
 
     it 'returns the expiry_time_millis' do
-      subject.expiry_time_millis.must_equal 146_213_208_861_0
+      subject.expiry_time_millis.must_equal 1_462_132_088_610
     end
 
     it 'returns the starts_at' do
diff --git a/spec/play_store/subscription_verification_spec.rb b/spec/play_store/subscription_verification_spec.rb
index 496b2e3..0cff712 100644
--- a/spec/play_store/subscription_verification_spec.rb
+++ b/spec/play_store/subscription_verification_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::PlayStore::SubscriptionVerification do
diff --git a/spec/play_store/verification_failure_spec.rb b/spec/play_store/verification_failure_spec.rb
index 4b3ba46..f3dd316 100644
--- a/spec/play_store/verification_failure_spec.rb
+++ b/spec/play_store/verification_failure_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::PlayStore::VerificationFailure do
diff --git a/spec/play_store/verification_spec.rb b/spec/play_store/verification_spec.rb
index c469b8f..ea22a3e 100644
--- a/spec/play_store/verification_spec.rb
+++ b/spec/play_store/verification_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::PlayStore::Verification do
diff --git a/spec/play_store/verifier_spec.rb b/spec/play_store/verifier_spec.rb
index a62e318..4b67025 100644
--- a/spec/play_store/verifier_spec.rb
+++ b/spec/play_store/verifier_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CandyCheck::PlayStore::Verifier do
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index f0c7f22..5c1a4a1 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'coveralls'
 Coveralls.wear!