Run experiments on your own body. Track supplements, compare results, and see what actually works — backed by your data, not influencer opinions.
Conflicting advice from influencers. No way to test what's real. Until now.
Test pre-workout vs placebo, creatine timing, fasted vs fed training — structured experiments with clear verdicts.
Skip the data entry. We pull workouts and sleep from Apple Health automatically — you just train.
Get a verdict, not a vibe. See exactly how much each supplement moves your strength, energy, pump, and focus.
Know what you're actually on. One-tap logging so your $200 stack stops being a black box.
Bad sleep poisons your results. StackLab flags any session run on under 6 hours so your experiment data stays clean.
All data stored on your device. No accounts, no cloud, no tracking. Your body, your data, your business.
Pre-workout vs no pre-workout. Creatine AM vs PM. Fasted vs fed. Tap one, log a week, get a verdict.
Test anything against anything — your stack, your variables, your bro-science. StackLab keeps it scientific.
See exactly how a bad night drops your strength score — the correlation your gym bros never tell you about.
Get a clean summary of what worked this week vs last week — no charts to read, just signal.
A live dashboard of your top 3 movers — the supplements with statistically meaningful effect on your training.
One number from 0-100 that captures how well you're training right now — easier to read than five charts.
Track consecutive days logged — every gap is a confounder, every streak is data you can trust.
What each supplement actually does, dosing that's research-backed, and which ones are worth your money — written in plain English.
Choose from templates like "Pre-Workout Test" or "Creatine Timing" — or build your own.
After each workout, rate Strength, Energy, Pump, and Focus in 5 seconds. Apple Health handles the rest.
Get clear verdicts with percentage differences. Cut what doesn't work, double down on what does.
Free to start. No account needed.