Why am I seeing "Sign in to Apple Account" when testing in-app purchases?

The cause for this alert depends on the type of device you're using to test:

iOS Simulator

iOS simulators cannot make real purchases or sign into real Apple accounts, you have to use a local StoreKit configuration file. If you're seeing this alert on a simulator it means you're either not using a StoreKit config or it's not set on your current scheme correctly.

Real Device

When testing in-app purchases in a development environment on a physical iOS device, you'll need to use a Sandbox Account to process test purchases.

1. Go to your device's Settings

2. Navigate to App Store

3. Select Sandbox Account

4. Sign in with your Apple Sandbox Account credentials