I edit novels so my command of English grammar is quite good, but no one is perfect and it's nice to 'get caught' when I slip up.

欢迎光临翻墙部落!
打开天窗，听听外面的声音!
穿越迷雾，寻找人生真谛!
https://github.com/osurf/jzdy/blob/master/README.md?

Works well enough. I uninstalled it because I found its built-in ads for Grammarly premium to be annoying and mean-spirited. It pops up in emails saying something like, "Are you SURE you want to send this email with its ADVANCED ISSUES, like poor word choice and weak phrasing? Click here to try Grammarly Premium!" Like, go climb a tree, Grammarly. You're here to correct typos, not neg me into shelling out cash over non-existent "advanced issues" in perfectly good emails. Obnoxious app.

Не работает для русских и беларусов, Умышленно. Лови кол нацистская фигня.