I'm using the in_app_purchase package for Flutter and i'm currently trying to tackle the subscription price change for Apple, specifically the price increase scenario. As described in their documentation, user must consent in case any of the following applies:
- The subscriber is located in a region that requires consent for
any price changes.
- The price increase is:
* More than 50% of the current price; and
* The difference in price exceeds approximately US$5 per period
for non-annual subscriptions, or US$50 per year for annual
subscriptions.
- The subscriber experienced a price increase for that subscription
within the past 12 months.
I've made a recurring monthly subscription, set up the renew period for the sandbox accounts to 3 minutes, set the price to €9.99 and subscribed to it with my sandbox account. Then i've increased the price of this subscription to €24.99, but the in-app price consent sheet was never shown, even after multiple renews.
Edit: I've forgot to mention that the subscription is still in the Ready to Submit status, since i've not published my app