This app was mentioned in 2 comments, with an average of 1.00 upvote
I used it on android but: Itunes: https://itunes.apple.com/us/app/emt-tutor/id427516922?mt=8 Playstore: https://play.google.com/store/apps/details?id=com.code3apps.EMTTutor&hl=en
4.99$ on both and definitely worth it