Supplement Tracker — Trialist

Stop guessing whether that supplement, bedtime, or new habit is doing anything. Trialist turns your iPhone into a personal lab: change one thing, and watch what actually happens in your own health data. HOW IT WORKS 1. Pick something to test — magnesium before bed, an earlier last meal, cold plunges, no late caffeine, a new routine. Anything you can do (or skip) on a given day. 2. Log it in a tap. Trialist reads your Apple Health data in the background. 3. See the difference. Trialist compares your "did it" days against your personal baseline and shows you the change — with the sample size and strength behind every number. WHAT MOVES YOUR DATA The heart of Trialist is one honest question: what actually moves your sleep, HRV, resting heart rate, steps, or energy? Trialist ranks your habits, doses, and journal tags by their real day-to-day effect — not by hype. Dig into dose-response ("how much is enough?"), timing effects ("does it matter when?"), and change-points ("when did things shift?"). RATE YOUR DAY Give the day a quick 1–10. Over time Trialist learns what separates your great days from your rough ones — and even which way the arrow points (does better sleep make a better day, or the other way around?). A JOURNAL THAT EXPLAINS THE OUTLIERS Capture what you ate, how you felt, or a gut symptom in a tap, and tag the day (sick, traveling, big meal, hard workout). Trialist lines those entries up against your metrics — so you can catch the food behind a rough night, or the symptom that shows up a day after a trigger. BUILT ON HONESTY Most health apps overclaim. Trialist does the opposite. Every result shows how much data is behind it (Limited / Good / Strong), calls associations what they are — associations, not proof — and lets you exclude sick or travel days so they don't skew your results. PRIVATE BY DESIGN - No account. No sign-up. - No cloud. Everything stays on your device. - No third-party tracking or ads. - Export your full data anytime as JSON, or a clean PDF to share with whoever you choose. TRACK EVERYTHING IN ONE PLACE - Binary habits, A/B comparisons (Running vs Cycling), dosed supplements, and timed routines. - A visual calendar of every trial, streaks, and adherence. - A day journal with tags to capture context (sick, traveling, big meal, hard workout…). TRIALIST PRO Create experiments, log every day, and see how your "did it" days compare to your baseline. Trialist Pro unlocks the full insight engine: "what moves your data", dose-response ("how much is enough?"), timing effects ("does it matter when?"), change-point detection, head-to-head experiment comparison, food-to-symptom lag, and the good-days analysis. — Trialist is for personal, informational, and educational use only. It is not a medical device and does not diagnose, treat, cure, or prevent any disease or condition. Always consult a qualified health professional before changing your health routine.