Support
FAQ
How do I restore my purchase?
Tap "購入を復元" (Restore Purchases) on the Pro purchase screen. If you are signed in with the same Apple Account you bought with, it is restored at no extra cost.
About iCloud sync
With iCloud sync on, your study records sync between devices on the same Apple Account. The data is stored only in your own private iCloud.
How do I report a mistake in a question?
Use "問題を報告" (Report a question) on the question screen. It opens an email. Fixes are listed in the corrections log (in Japanese).
What is free?
The fire law subjects and the first units of each class are free. Pro is a one-time purchase and opens all questions, mock exams, identification drills and drawing drills.
Contact
Japanese or English is fine. For a mistake in a question, "Report a question" in the app is the fastest way.