With your Personal Writing Assistant, you can check your grammar, spelling, punctuation, and more.

'Grammarly'

link:- https://play.google.com/store/apps/details?id=com.grammarly.android.keyboard

Grammarly can help you minimise writing errors and find the perfect words to express yourself in a variety of ways, from grammar and spelling to style and tone. 

Grammarly will provide you real-time comments on Gmail, Google Docs, Twitter, LinkedIn, and practically anywhere else you write. Grammarly is a writing assistant that provides you with specific recommendations to help you improve your writing and it goes much beyond that.