Uninstalling the app will not cancel your subscription or cancel any charge.
For subscriptions, cancelation, and refund requests are required.
For a Lifetime purchase, only a refund request is required.
In order to cancel the subscription and request a refund, please contact either the Google Play Store or the Apple App Store. Here is how:
On Android:
Cancel: https://support.google.com/googleplay/answer/7018481
Refund: https://support.google.com/googleplay/answer/2479637
On iOS:
Cancel: https://support.apple.com/en-us/HT202039
Refund: https://support.apple.com/en-us/HT204084
Additional information:
1. Subscription and Lifetime packages separately proceed and do not affect/depend on each other.
2. Subscriptions will be automatically renewed unless you cancel them at least 24 hours before their expiration time.
3. Lifetime package is an in-app product, not a subscription. Therefore, it will not appear in the Subscription menu.