Grammarly offers a mobile keyboard that allows you to access writing suggestions on Android and iOS devices.
On iOS, you can also access the Grammarly iPhone Editor and Grammarly for Safari on iPhone all bundled into a single app.
All iOS devices running iOS 14 or newer are supported. You can install Grammarly on your device by following these instructions.
Note: Grammarly for Safari on iPhone is only available on devices running iOS 15 or newer.
As for Android, Grammarly is compatible with all devices running Android 9.0 or newer. Tablets are supported as well. To install Grammarly for Android, please follow the steps outlined here.