To cancel your OtoZen subscription on an Android device, follow these steps:

1. Visit the Google Play Store website or open the Google Play Store app.
2. If you're on the website, go to https://play.google.com/store/account/subscriptions.
3. Find the OtoZen subscription.
4. Select Manage and then choose Cancel Subscription.
5. Follow the on-screen instructions to complete the cancellation.
   
   
   You can also navigate in the OtoZen app to: Settings >  Manage Your Plan  > Choose to Manage Plan to make changes including a cancellation.
   
   
   Remember, canceling your subscription will stop future payments, but you'll still have access to OtoZen's features until the end of the current billing period.