A miss counts as a miss
4,300 steps doesn't count as 10,000. Welly marks the day for what it was, so the streak you finish is one you earned.
Know your body. Own your day.
Welly turns your watch data and your daily logs into answers: how recovered you are, how hard to push, and what your bad days have in common.
Download appFor iPhone and Apple Watch
Made for you if you're
Works with
- Apple Watch
- Apple Health
- Oura
Start the day knowing where you stand
Sleep, Recovery, and Strain, scored against your own normal instead of everyone else's.
Not just hours in bed. Welly weighs how long you slept, how much of it was deep and REM, and how often you woke, then scores it against your own usual night.
Five signals from your sleep, led by HRV and resting heart rate, become one number each morning. High means go. Low means your body is asking for an easier day.
A daily target built from your own training, raised when you're recovered and lowered when you're not. Every hard minute counts, workout or not.
- The detail behind them
A battery for your day. Sleep fills it, stress and workouts drain it, and you can see what each one cost.
Heart rate and HRV show, minute by minute, whether you're relaxed, activated, strained, or drained, so you can step back before the day wears you down.
Welly weighs this week's training against your last six and tells you whether you're building, holding steady, or overreaching.
Your heart rate from midnight to midnight, with your sleep, workouts, and what you logged marked along it.
Built around you
Scored against you
An HRV of 45 is great for one person and poor for another. Welly learns your normal and scores you against it.
Works for night shifts
No assumed bedtime. Sleep from 2am to 10am, or in two blocks, and Welly scores you against your own schedule.
Tells you why
A low score comes with the reason, like “Your HRV was lower than usual last night,” and one thing to do about it.
Doesn't fake it
If your watch missed something overnight, Welly leaves it out instead of guessing.
For anyone taking on a challenge
Finish something you can prove
Most challenges are a checklist you fill in yourself. Welly scores each day from your steps, sleep, workouts, and logs, so a finished streak means something.
Watch the streak build
Every day of the challenge on one grid, colored by how it went.
Welly 75, ready to go
10,000 steps, 30 minutes of daylight, no alcohol, no nicotine, seven hours of sleep, and seven workouts a week, for 75 days.
Or make it your own
- Dry January
- No alcohol for 31 days, checked against your logs.
- Sleep reset
- Seven hours a night, averaged over each week.
- Morning light
- Twenty minutes outside, every day.
- Run streak
- Fifteen miles a week, counted from your workouts.
- Strength habit
- Three strength workouts a week.
- Quit for good
- Nicotine-free from the day you stopped, with no end date.
- Your own rule
- A daily yes or no for anything Welly can't measure, like ten pages of reading.
A score every lap
Play your goals every week, every month, or for a set number of days. Each lap ends with its own score. A miss costs points, never the challenge, and you can change goals before the next lap.
Download appFor anyone managing symptoms
Find what your flare‑ups have in common
You know the bad days. You can't always see what led to them. Log how you feel and what you ate, and Welly compares your good days with your bad ones.
Log how you feel
Find a symptom by name or by where it hurts and rate it 1 to 10. It takes a few seconds.
Log what went in
Meals from a photo or a sentence. Medications, supplements, coffee, and water in a tap. Welly spots things like gluten, dairy, and soy for you.
Ask the question
“I want less headache.” Pick the symptom and Welly goes looking through everything you logged and everything your watch recorded.
See what stands out
Headaches on 46% of days with nuts, and 9% without. Real numbers you can take to your doctor.
Patterns you can trust
It waits for enough days
A food has to show up on at least ten days before Welly says anything about it.
It checks tomorrow too
Some things hit the next morning. Welly compares the same day and the day after.
It doesn't play doctor
You get patterns, not diagnoses, and every result says so.
It stays on your phone
Your logs and patterns are stored and worked out on your iPhone.
Want the details? How Welly handles your data
Download appGo deeper with Ask Welly
Ask a question in plain words and get an answer drawn from your own records.
Answers from your own data
Ask why you feel flat, or how this month compares with last. Welly pulls the records the question needs and answers from them.
Charts on request
“Plot my sleep against my steps.” Welly draws it from your records, right in the chat.
It shows its work
Every answer lists the data behind it.
Ask how anything works
“How is my recovery score calculated?” gets a straight answer.
Off until you turn it on
Cloud chat stays off until you allow it, and you can switch it off again whenever you like.
And there's more
The rest of what Welly keeps an eye on.
Your cycle, in context
See your phase, your next period, and fertile-window estimates next to your sleep, recovery, and training. Predictions adapt to your own history.
Activity
Every workout on one calendar, with splits, zones, and routes a tap away.
Journal
Everything you've logged, on one calendar.
Daylight
See how much morning light you're actually getting.
Smart Alarm
A bedtime that fits your sleep goal and a gentle wake on your wrist.
Apple Watch
Your scores, energy, and stress on your wrist.
Widgets
Scores, energy, and last night's sleep on your Home Screen.
Private by default
Your health data stays yours.
Calculated on your iPhone
Scores and patterns are worked out and stored on your device. Welly keeps no general server copy of your Apple Health history.
AI is opt-in
Meal estimates and Ask Welly send data only after you switch them on, and only what the request needs.
Never shared for advertising
Heart rate, sleep, cycle, nutrition, and the rest of your health data are never sent to advertising partners.
