Sentence discussion in app
It'd be great to have a comment option in practice mode for individual sentences in the app the way there is on the website, for more explicit discussion of finer grammar tweaks.
We're working on a way to integrate that into the app. Right now, you'll want to share the sentence feedback via. email. Go to the home screen in the app and select 'feedback' to shoot us an email, and we'll take a look.