Trying to open the app after my initial use seems to crash it before anything can even load on my screen. Have tried this a couple times now (uninstalling and reinstalling). I download and use the app the first time. Exit and kill the app. Then try to reopen it for a subsequent use (minutes, hours, or days after first) only to have it crash immediately. Very strange bug.. would love to see this fixed so I can utilize what seems to be a wonderful learning tool accordingly :)