CogiTrain

In-app purchases
Content rating
Everyone
10+
Downloads
Content rating
Everyone
Learn more
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About this game

Some days you're sharp. Some days you're foggy. You've probably got a guess why — bad sleep, too much coffee, last night's drinks — but you don't actually know.

CogiTrain is a two-minute daily test. Log how you slept, what you drank, how stressed you were — then it works out what's actually connected to your reaction time, and what's just a story you've been telling yourself.

Five real cognitive tests, the kind researchers actually use — reaction time measured to the millisecond, not a made-up score.

No brain-training claims. No "boost your IQ." Just your own numbers, measured against your own baseline, with the math shown so you can check it yourself.

FREE TO PLAY
All five tests, unlimited sessions, no paywall on the testing itself.

PRO UNLOCKS
The pattern engine that finds what's actually moving your numbers — sleep, alcohol, caffeine, stress — and tells you plainly when it finds nothing. $9.99, 30 days.

Built solo, not by a company. If something's broken or missing, there's a way to tell me right in the app.
Find out how much your habits are slowing your brain down.
Updated on
Aug 9, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info, Financial info and 3 others
Data is encrypted in transit
Data can’t be deleted

What’s new

Cleaned up wording across the app for clarity.