ThinkLeft
Know when your brain is sharp. Track fatigue.
ThinkLeft launched on April 21, 2026 with 2 votes, #4,561 of 21,248 launches that month.
What it does
Every decision drains mental energy — but most people have no idea when their brain is actually running on fumes. ThinkLeft gives you a real-time 0–100 cognitive fatigue score based on 4 signals: decisions made, time of day, fidgeting, and app hopping. After a few days it calibrates to YOUR baseline — so you see your personal peak hours and afternoon slump, not a generic average. Free. iPhone only.
Download ThinkLeft by Jean Gonzalez on the App Store. See screenshots, ratings and reviews, user tips, and more apps like ThinkLeft.
Free · In‑App Purchases · Designed for iPad. Not verified for macOS. v1.0.4 — Your clock, your patterns Decision Quality (new hero) See the hours you make sharp calls vs. regrets. Hour-by-hour quality bars, best-hour and riskiest-hour callouts, and day-of-week patterns — all from your own outcome ratings. Decision journal Add a quick reflection after rating any decision. Your past notes show up inline so you can spot what worked. Smarter Delay Mode When you pause before a heavy decision, we now suggest a better time today based on your circadian peak. "Should I Decide Now?" widget New home-screen widget gives a one-glance YES / MAYBE / WAIT based on your live fatigue. Meeting cost estimate…from apps.apple.com
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