Jishin Sensei — fact sheet (v1.0.10)

Name: Jishin Sensei ("Earthquake Teacher")
Platform: iPhone and iPad (App Store) — https://apps.apple.com/app/id6799572857
Developer: Makoto Katano (sukunabicco), solo developer, Japan
Launched: August 18, 2026 (1.0). Version 1.0.6: everything free. Version 1.0.7 (September 12, 2026): cards rebuilt with answer boards, trip card. Version 1.0.10 (September 25, 2026): iPad
Price: Free. Optional tips for the sensei (USD 1.99 / 4.99 / 9.99) unlock nothing
Content: 68 scenario questions in 5 categories, one per day, 58 with a photo or chart; explanations cite official sources (JMA, JNTO, Tokyo Metropolitan Government and others)
Languages: English, Japanese, Korean, Simplified Chinese, Traditional Chinese
Prepare tab: 31 communication cards that write the Japanese for you (read aloud, answer boards, a pad to write on; 27 helper cards in the Japanese UI), trip card, health card (iOS Keychain), sign dictionary of 39 words (paste photo text to search), Destinations (9 areas)
Emergency tab: works fully offline — what to do, by place, emergency numbers, 171, Japan Visitor Hotline
Privacy: no accounts, no ads, no analytics, no server; everything stays on the device
Built for: RevenueCat Shipaton 2026
Press contact: sukunabicco@gmail.com
Website: https://sukunabicco.github.io/jishin-sensei/
Not affiliated with any government body. The official alert app is "Safety tips" (Japan Tourism Agency).
