Your body has been signaling for years. Vayl just organizes the transcript.
These are the loudest complaints from r/Fitness, r/AdvancedRunning, r/PEDs, and 1–3⭐ App Store reviews of the apps you already pay for. Every one of them is solved here.
One timeline. Lifts, food, doses, sleep, biomarkers.
Hevy for sets. MyFitnessPal for macros. Athlytic for recovery. A separate sleep app. A note for supplements. Vayl runs all of it on a single timeline so apps that should talk to each other finally do.
Cross-domain correlation, not a single score.
Recovery scores hide the math. Vayl shows the data raw — HRV next day after heavy deadlifts, sleep efficiency the night you tried 4.5 L of water, RHR drift after a dose change. You see the link, not someone else's interpretation.
Substance log with literature-validated half-lives.
Existing trackers chart calendars and call it done. Vayl carries 295 substances with PK curves drawn from published half-lives, custom entries you control, and Tier 1–3 honesty about how each number was sourced.
Export everything you log. PDF + CSV. Always.
Apps lock data behind paywalls or break exports. Vayl ships PDF and CSV export of every record from day one. Subscription lapses, account closes — the timeline still walks home with you.
Phone for between sets — voice, tap, offline. Desktop for the patterns — builder, comparisons, exports. Same data, two surfaces, no double entry.
Between sets, in the kitchen, on the road. Voice and tap. Works offline.
Build your own correlations. Save what works. Export your timeline whenever you want.
Try free for 14 days. Pay $11.90/month after. Or skip the math and pay yearly. Same Vayl in every plan.
No card. No commitment. See if it clicks.
Everything Vayl ships. No tier games.
Same Pro · 38% off · ~$7.40/mo equivalent.
Prices in USD · EU and BR adjusted at signup · Cancel anytime
Vayl is built to coexist, not replace. WHOOP for the wrist data, Oura for the ring data, Strong for the lifts you log fastest — Vayl pulls them onto a single timeline you can read.
| Feature | Vayl | WHOOP | Oura | Strong | MyFitnessPal |
|---|---|---|---|---|---|
| Lifts (sets, reps, RPE) | |||||
| Macros + foods database | |||||
| Sleep + HRV + RHR | |||||
| Substances log + PK curves | |||||
| Cross-domain correlations | |||||
| Self-tracked biomarkers | |||||
| Cycle context (lens, not tracker) | |||||
| Export PDF + CSV | |||||
| No proprietary hardware | |||||
| Offline-first mobile | |||||
| Price | $11.90/mo | $30/mo* | $6/mo + ring | $4.99/mo | $9.99/mo |
* WHOOP price includes wearable subscription bundle · Oura excludes ring hardware cost
Vayl is a tracking tool. It surfaces patterns in the data you log. It does not interpret your body for you. The contract below is stated explicitly so you never have to guess.
Fourteen days free. No card. Cancel before the trial ends and you pay nothing.
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