Pocket Professor: Physics is a unit-aware physics calculator and study app: lessons that follow a college physics course, worked problems, free-body diagrams and practice problems with worked solutions.
Use the Feedback button in the app (Settings, then Send feedback).
How do I type a charge, like Fe³⁺? Tap Fe, then the Ion ± key (General and Professional modes).
How do I start over? Tap the red Clear button in the top-right of the display.
I bought General or Professional on a new phone. Open Settings, then tap Restore next to Purchases.
Is my data collected? No. See the privacy policy.
Instructors: Practice, then "make a problem set to share" gives a link and QR code; every student gets the same problems.