A customer told the Guardian they had stopped using Freeletics, missed the renewal date and was charged £75, then was initially refused a refund after contacting the company. Freeletics later agreed to refund the charge. The company said app-store subscribers receive renewal reminders and that it seeks to refund users it believes should not have been charged. The customer said no reminder had arrived.
Sources
https://www.theguardian.com/money/2022/dec/20/app-auto-renew-refund-freeletics
Freeletics has agreed to refund your £75. It says that where a subscription is bought via the App Store or Google Play App Store, reminders are sent out before the subscription is renewed.