Subcribed to iOS app:
Go to the App Store -> Click on your details (right corner) -> Click on your Apple ID -> "Subscriptions". Tap a subscription of Annie Baby Monitor and then tap "Cancel Subscription".
Subcribed to Android app:
On your Android phone or tablet, open the Google Play Store (check to make sure you’re signed to the correct Google Account). Tap „Menu“ (your icon / profile photo in upper right corner), then tap „Payments and Subscriptions“ and choose „Subscriptions“. Select Annie Baby Monitor app, tap „Cancel subscription“ and follow the instructions.
Subcribed to LITE app (web browser or Microsoft/Linux app):
Go to the LITE version of the app (web browser version or the desktop application) and log in to your account. Go to the menu of the app and click on "Premium Account". Here, click on the "Purchase management" link, which will take you to the billing zone. Find "Annie Baby Monitor" app, click on the related "Cancel Subscription" link and follow the instructions.