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Cortex: Attention Lab

Reaction Test & Focus Score
Hendrik Alastair Kung · Health & Fitness
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App info

Developer
Hendrik Alastair Kung
Category
Health & Fitness, Productivity
Released
Sep 9, 2026
Version
1.2.1 (Sep 29, 2026)
Price
Free
Size
10.7 MB
Requires
iOS 17.0
Age rating
9+
Languages
English

In-app purchases

Cortex Pro Monthly$4.99
Cortex Pro Lifetime$79.99
Cortex Pro Annual$34.99
Current prices, App Store US.
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About Cortex: Attention Lab

Most apps guess. Cortex measures. A 60-second reaction time test every morning gives you a focus score against your own baseline. Then one-habit experiments show whether sleep, caffeine or a new routine actually changed it: real effect, no effect, or inconclusive. YOUR MORNING SCORE - A 60-second reaction-time test, taken in your own morning window - Scored against your personal baseline — never someone else's average - Streaks, shields, and ranks that reward showing up REAL EXPERIMENTS - Change one variable: caffeine cutoff, phone-free first hour, shorts curfew, cold finish, and more - Cortex compares your baseline days against intervention days - Verdicts are graded by evidence strength — A, B, or C HONEST BY DESIGN - If the result is noise, Cortex says so: "no meaningful effect" is a real answer - No made-up insights, no dressed-up randomness - Correlations are labeled as hints, not…
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