N-Back Training

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.