Five minutes of brain training a day, scored against yourself.

How it works

1. 1

   Calibrate

   A short run through all six exercises sets a sensible starting difficulty for each one.

2. 2

   Train

   Five, ten or fifteen minute workouts. Each set adjusts its difficulty from how the last one went.

3. 3

   Progress

   Track accuracy, speed and difficulty per exercise against your own earlier sessions.

Six brain training exercises

Each one is a well known cognitive task, adapted into a short timed set. Every exercise is free to try in the browser.

• Response inhibition

  Reaction Control

  Respond fast to the target shape and hold back when it is not the target. Trains attention held over time and the brake on an automatic response.

• Selective attention

  Colour Conflict

  Name the ink colour of a word, not the word itself. Trains the ability to keep the relevant feature in front and push a stronger habit aside.

• Working memory

  Memory Match

  Hold a moving run of positions in mind and say whether the current one repeats the position from N steps back. Trains working memory under a steady pace.

• Visual-spatial memory

  Spatial Sequence

  Watch a run of cells light up, then reproduce the order. Trains visual-spatial working memory and the span you can hold at once.

• Mental flexibility

  Rule Switch

  Classify the same shape by colour or by form, following a cue that keeps changing. Trains the cost of dropping one rule and picking up another.

• Mental arithmetic

  Number Sprint

  Solve short arithmetic problems against the clock and pick the right answer from four. Trains mental arithmetic and how fast you can apply it.

Measured against you, not a population

Every score describes how you did on that specific task, on that day, at that difficulty. There is no percentile, no ranking against other people and no single overall number that claims to summarise your mind.

Your data stays here

Your training data stays on this device. No account, no server, no tracking. The phone apps make one network call, to check a Pro purchase with the store.

What this is not

This app is not a medical device. It does not diagnose, treat or prevent any condition, and it does not measure intelligence.

Practising a task reliably improves that task. Evidence that training on tasks like these transfers to everyday thinking is mixed and far from settled. Train because focused practice is useful and measurable, not because an app promised you a sharper brain.

Start with calibration

It takes about five minutes. No account, no email address.