Do you actually know what works for you?
First month free if eligible.
iPhone and web terminal · one subscription opens both
Your watch counted every night. Connect Apple Health and 90 days of sleep, heart and cardio arrive on their own. Your sets, your meals, what you took and how you felt, you log in Vayl.
You never had a capture problem.
- Heart & recoveryheld VaylheldWristheldRingnot heldLifting appnot heldMacro app
- Sleep architectureheld VaylheldWristheldRingnot heldLifting appnot heldMacro app
- Sets, load & volumeheld Vaylnot heldWristnot heldRingheldLifting appnot heldMacro app
- Macros & intakeheld Vaylnot heldWristnot heldRingnot heldLifting appheldMacro app
- What you tookheld VaylheldWristheldRingnot heldLifting appnot heldMacro app
- How you feltheld VaylheldWristheldRingnot heldLifting appnot heldMacro app
Vayl reads your cardio workouts through the Apple Health app. Explore outdoor runs and rides with GPS routes, per-sample heart rate and power, plus bike cadence.
None of this gets typed at a desk.
It gets logged between sets, in the kitchen, on the road, with one hand and no signal. The phone is where the record happens. The desktop is where it finally means something.
Training
2 / 7 sessions this week
Weight
30-day trend
Body
Sleep · heart · glucose
Nutrition
4 / 7 days tracked
Works with no signal. What you log offline syncs when you are back.
Your HRV dropped for nine days. Was it the training block, or what you started three weeks earlier?
The web terminal lays five Spectrum signals on one axis and shifts one against another by up to fourteen days, because a body doesn't answer on the same day you ask. Every pair is rebuilt from the days that actually carry a value on both series. Nothing is filled in.
Spectrum signals, in pairs · lag −14 to +14 days · correlation suppressed when there are too few real pairs to mean anything
Your weight is down nine pounds. How much of that was fat?
Weight alone can't answer it, and neither can a scale that guesses. The web terminal keeps one window (sleep and its efficiency, glucose, resting heart rate, composition by the method you actually use), so a change shows up next to everything that was happening around it.
Sleep, cardiac, metabolic, activity and composition channels on a shared window · four methods for body fat · fifteen tape measurements
You trained hard all month. Did the load land where you meant it to?
Sessions, volume and the shape of your week, with the zone-two debt read as debt, against the reference you set, not a target somebody chose for you. Strength, cross and cardio sit on equal rails, because your week has all three.
Strength, cross and cardio · cardio load from RPE × minutes · thirteen-week frequency map · the full logbook
You hit your protein most days. What happened on the days you didn't?
The web terminal shows how many days you recorded, and the shape of the ones you skipped. Plan against real, intake against expenditure, hydration included. No projection, no 'if every day looked like today'.
Logged days audited against the window · plan versus actual per macro · intake versus expenditure · daily hydration, as logged
Your training load fell for three weeks in April. Was it the program, or was it what you were taking?
Alchemy keeps what you take. Its curves use half-life to model how much remains on any given day instead of treating it as a date on a calendar.
The web terminal puts that curve beside your cardio sessions, body composition and blood panels. You can see the weeks line up, or see that they don't.
Searchable by the name on the box, not just the chemical one · half-life with its catalog provenance shown · supplements stay off the accumulation curve, because they don't belong on it
What the catalog holds
3,090
Medications
4,012
Substances in all
Three out of four are everyday medication
Half-life
- Amlodipine40 h
- Sertraline26 h
- Atorvastatin14 h
- Losartan6.5 h
- Metformin6 h
- Prednisone3 h
- Ibuprofen2 h
- Amoxicillin1.3 h
Counted in the catalog on 2026-07-27
Your last panel came back. What moved, and what changed before it?
Log each draw with its lab, its time and whether you fasted. 284 lab markers, from testosterone, estradiol and hematocrit to ApoB, Lp(a) and HbA1c, with catalogue reference ranges for 259 of them, labelled separately from the range printed on your report. On the web terminal any marker with numeric results can share one timeline with the half-life curves of what you take, your calories and macros, your cardio and the symptoms you logged, so a change shows up next to what happened around it.
Vayl reads. The reading is yours.
It will not tell you what to take. Not because it can't compute an opinion, but because the moment a tool hands you a verdict, you stop looking at the data that produced it.
Always
- Show the raw value and its unit
- Put what you took next to what your body did
- Leave missing days unmeasured
- Let you export logs as CSV or JSON
Never
- Tell you what to take
- Score your body, or rank you against anyone
- Pass estimates off as readings
- Sell your data, or train anything on it
So, do you actually know what works for you?
First month free if eligible.
Web terminal
The terminal at vayl.pro reads the same record as the iPhone app, on a screen wide enough to lay years on one axis. A Vayl subscription opens both.