Support
For help with Which & Why: AP Calculus, email [email protected]. We read every message and reply as soon as we can.
If a question or an answer looks wrong, tell us which app, the topic number (for example, Topic 1.3) and, if you can, send a screenshot.
Common questions
What is free?
The first two units of each course are free, with every feature: Solve it together, worked examples, reviews and badges. One purchase unlocks the full course. There is no subscription.
How do I restore my purchase?
On the Units tab, tap the gear to open Settings, tap Unlock beside Full course, then tap Restore purchase. Use the same Apple Account you bought with. With Family Sharing, your family gets the full course too.
How do I get a refund?
Purchases are handled by Apple. Request a refund at reportaproblem.apple.com.
Does my progress move between my devices?
Yes, through your own iCloud, when you are signed in to the same Apple Account on each device. Without iCloud, the app works fully on one device.
Can I keep a copy of my progress?
On the Today tab, open Your data & iCloud and tap Save a copy. Merge a copy back adds it to another device without overwriting anything.
How do I delete my progress?
On the Today tab, open Your data & iCloud and tap Erase all progress. Deleting the app also removes its data from that device. To remove the copy in your iCloud, go to Settings → your name → iCloud → Manage Account Storage and delete the app's data.
What do Learning, Without help and Remembered mean?
- Learning: you have answered a question in the topic. Help is welcome.
- Without help: every skill right on two different questions, on your first try, on your own.
- Remembered: a week later, five right in a row that cover every skill.