Unfortunately, Grammarly has more cons than pros and the android mobile app is painstakingly awful. After a year of daily use, there were more issues that led me to cancel my Premium subscription despite the 50% discount offered by Grammarly to renew. However, if you're willing to purchase a thesaurus and an updated grammar book, it is worth the one-time purchase instead of paying a yearly cost for Grammarly. The rest of the cons was sent to Grammarly feedback as their limit is 800 characters