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 verdicts TRENDS AND CONTEXT - 14-, 30- and 90-day trend charts around your personal noise band - Optional Apple Health context: sleep, heart-rate variability, resting heart rate and steps alongside your scores - Your data stays on your iPhone — no account, no cloud; full CSV export any time SUBSCRIPTION REQUIRED Cortex is a paid app: a subscription (or the one-time Lifetime purchase) is required to use it — there is no free plan. Every plan includes the whole app — the morning test, unlimited experiments, correlations, trends and full history export. - Cortex Annual — US$34.99 per year (auto-renewing) - Cortex Monthly — US$4.99 per month (auto-renewing) - Cortex Lifetime — US$79.99 one-time purchase (not a subscription) Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Your Apple Account is charged for renewal within 24 hours before the current period ends. You can manage or cancel a subscription in your Apple Account settings after purchase. There is no free trial. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://cortex-attentionlab.netlify.app/privacy.html Support: https://cortex-attentionlab.netlify.app/support.html Cortex is a general-wellness app. It does not diagnose, treat, cure or prevent any disease or condition, and it is not a medical or psychological assessment. Cortex doesn't promise to fix your focus. It gives you the instrument to find out what actually helps. Eligible new subscribers can get the Annual plan for US$19.99 for the first year, then US$34.99/year, automatically renewing until cancelled. Apple’s localized prices and introductory-offer eligibility apply. No free trial.