Im a animation teacher and use to teach stopmotion animation with my students. I will sugest two adds. First one, a tool to stop the looping when playing. Its important to have an option to play or not in looping. Second one, when taking pictures a option to flip between live and last picture. This make Animation more easy than onion skin. Good job guys!!
Sil olberga about iMotion Pro, v2.2.6