Updated
Your data in the app

The STEMpump App has no accounts and doesn't track you. Your favorites, Continue Learning, lesson progress, quiz scores, camp progress and certificate name are saved only on your iPhone or iPad.
That means they don't sync to your other devices or to STEMpump.org, and deleting the app deletes them.
Erasing your data
Tap the Settings button (the gear) at the top of Discover. Under Data Storage, you can erase each kind of data separately: your favorites, Continue Learning, lesson progress, quiz scores, review questions, camp progress and certificate name. You can also remove downloaded courses there. Each option asks you to confirm, and erased data can't be recovered.