How to determine if an introductory offer has been used in Swift?

To determine if an Auto-Renewable Subscription Introductory Offer has been used before, check if a customers transaction history includes the subscription.

Oscar de la Hera Gomez
Written by Oscar de la Hera Gomez
First published on 03/27/2023 at 09:55
Last Updated on 03/27/2023 at 15:44
Three flowers that represent StoreKit, Swift and XCode side by side. Beneath them sits the text “Has an Introductory Offer been used?”

To determine if an Auto-Renewable Subscription Introductory Offer has been used before, check if a customers transaction history includes the subscription.

The guide was made using our Free iOS StoreKit 2 Open Source project which is recommended for developers or business folk wishing to learn about how In-App Purchases or Subscriptions work and the code behind them.

SubscribeFree Open-Source Apple StoreKit 2 Swift Project

In your project, add the code below.

We recommend that you add this to the StoreKitCoordinator in an extension file called StoreKitCoordinator+IntroductoryOffer.swift.

Please note that the checkVerified function was created as part of our StoreKit Coordinator guide.

How to create a StoreKit Coordinator in Swift

Looking to learn more about developing apps with StoreKit 2?

Read our comprehensive development guide linked below to learn about all the secrets behind developing In-App Purchases and Subscriptions with StoreKit 2.

Read Apple StoreKit 2 Development Guide

Any Questions?

We are actively looking for feedback on how to improve this resource. Please send us a note to inquiries@delasign.com with any thoughts or feedback you may have.
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