Features & Capabilities

I wanted to play "Oni Keisan" on my iPhone! That's why I created this N-Back brain training app.

What is this training?

Solve calculations while remembering the answers from a few questions back. Juggling "memorizing" and "calculating" at the same time gives your brain a real workout.

Features

◆ Two Input Modes

  • Tap Mode: Quickly tap the answer
  • Handwriting Mode: Write numbers directly

◆ Build Daily Habits

  • Set daily play goals
  • Track your streak
  • Record how you're feeling today

◆ Track Your Progress

  • Accuracy trends
  • Level-up history
  • Play history

◆ Customize Your Way

  • Adjust question count & time limits
  • 3 color themes
  • iPhone & iPad support

Perfect For

  • Those who want to play Oni Keisan without a dedicated game console
  • Anyone looking for a quick mental exercise
  • People who want to build a daily habit

Just 5 minutes a day. A casual brain training experience.

User Growth & Download Statistics

App
By:
chunson yamada
Version:
3.1.1 Last updated: 2026-02-01
Version code:
882043331
Creation date:
2022-07-17
Compatible devices:
Size:
21.23MB
URLs:
Website ,Privacy policy
Full description:
See detailed description
Source:
Apple Apps Store
Data ingested on:
2026-06-06
Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.
Developed by:
chunson yamada
Apple Apps Store
https://apps.apple.com/us/app/n-back-training/id1627478554
Website:
https://note.com/toastar/n/n9e6b03d99470

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