Help & Support
Last updated October 6, 2026
Questions, bugs, or a mistake in a question? Email federico.buteraandreu@gmail.com. We usually reply within a few days.
Do I need an account?
No. Everything works without one, and your progress is saved on your device. An account lets you sync across devices.
Should I take the diagnostic?
If you've already studied some of the course, yes: your plan will skip what you know. If the course is new to you, choose Start from Unit 1. You can take the diagnostic later from Practice.
How is my readiness level worked out?
From your accuracy on each topic weighted by its share of the exam, how you do on harder questions and free-response, and your practice exam results. It's an estimate, not an official score.
I found a mistake in a question.
Thank you! Email us the subject, topic, and question text and we'll fix it.
How do I delete my account?
Profile → Account → Delete Account. It removes your account and synced data permanently.
How do I move my progress without an account?
Profile → Your Data → save a backup, then restore it on the other device.