In order to cancel a subscription on the Android devices, please do the following.
1. Unblock your device and tap the Play Store icon to access the Google Play Store.
2. Tap the hamburger icon in the left top corner.
3. In the pop-up menu, tap the Subscriptions section.
4. Tap the subscription you want to manage.
5. Scroll down the screen and tap Cancel Subscription, then follow the instructions.
*Note: After cancelling the subscription, the full functionality of the app will still be available to you until its expiration date.
In our example, the full functionality of the app Colouring Book for Me & Mandala is available until 8 Apr 2019.
For more details, please check this link: https://support.google.com/googleplay/answer/7018481?co=GENIE.Platform%3DAndroid&hl=en.