A
iOS, Android product
Added November 9, 2026
About the product
Anzan Zen is a mental math trainer for iOS and Android built around flash anzan: numbers appear one at a time, you add them in your head, then say the total aloud or use the keypad. Dictation reads numbers aloud, while Chain asks you to keep a running total through addition, subtraction, multiplication and division.
Free play includes warm-ups, Flash levels 1–5, Dictation level 1, both chains and voice answers. A one-time Pro purchase unlocks higher levels and custom Flash settings; there is no subscription. No account or ads. The 20 Flash levels follow published Japanese exam tables, but the app does not provide official certification.
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