Free AI coach for iPhone

Aurin reads your sleep, HRV and workouts and turns them into one number, one plan and one coach every morning.

Coming soon to the App Store
Readiness

One number every morning.

HRV, resting heart rate and sleep, weighed against your own normal. The journal shows what lifts it and what drags it down: alcohol, a late meal or the sauna.

Strain

Know when to push and when to back off.

Every workout and every step adds up. Aurin shows where today should land and how your week builds.

Training

A plan that adapts.

An activity for every day, picked for how you recovered and ready in advance. Follow a training plan, plan the week yourself or let the AI do it, and sync it with Intervals.icu.

Gym

Sets, weights and muscle recovery.

Turn a 3D figure and tap a muscle to see how tired it is from the gym and your runs. Supersets, left and right side, warm-up and stretching, and a rest timer between sets that stays on your lock screen.

Nutrition

Food that follows your training.

Snap a photo, scan a barcode or just tell the coach what you ate. Your target moves with the day’s load, food from other apps comes in too, and fibre, sugar and salt are always counted. Aurin Pro adds vitamins and minerals.

AI coach

Just ask. It knows your data.

It remembers what you tell it, and you can see and edit what it remembers. It also speaks up on its own, at most once a day.

Free for everyone.

Works with what you wear.

Any watch or ring that saves to Apple Health or Google Health, plus power and plans from Intervals.icu. Wear more than one? Aurin takes each night and day from the one you wear most, or you pick.

Apple Health

Into Aurin
sleepworkoutsheart rateHRVstepsweight
Sent back
workoutsweightfoodwater

Google Health

Into Aurin
sleepworkoutsheart rateHRVstepsfood
Sent back
fooddrinksworkouts, if you allowweight, if you allow

Intervals.icu

Into Aurin
workouts with powerplanzonesweight
Sent back
planned workoutscalorie targetweightsleep, HRV and daily values

Ultrahuman Ring

Into Aurin
sleepresting heart rateHRVVO₂maxtemperature
Sent back
nothing, Aurin only reads the ring

WHOOP

Into Aurin
sleepresting heart rateHRVbreathing rateblood oxygen
Sent back
nothing, Aurin only reads WHOOP

Wahoo

Into Aurin
finished rides and runspower and TSSheart rate
Sent back
planned workouts, to ELEMNT and KICKR

Your data works only for you. Aurin reads only what you allow, never sells it or uses it for ads, and you can delete all of it in Settings at any time.

Full privacy policy

Google Health data disclosure

Aurin (Petr Fitness Data) is a personal training service that organizes training history, generates strength workouts, uses cycling context, and supports nutrition workflows.

With your authorization, the service may read fitness, health-metric, sleep, and nutrition data from Google Health. It may also add nutrition logs to Google Health when you ask the service to record food or drinks. This data is used only for the requested training and nutrition features.

The service can process training and fitness data from connected services, including Google Health data that the account owner has authorized, in order to provide these requested workflows.

Two optional permissions are requested separately: adding weight records to Google Health (weight you log in Aurin or Intervals.icu) and reading your date of birth from your Google Account to fill in your age.

Aurin’s use and transfer to any other app of information received from Google APIs will adhere to the Google API Services User Data Policy, including the Limited Use requirements.

The use of information received from Google Health API and/or Developer Tools will adhere to the Google Health API Developer and User Data Policy, including the Limited Use requirements.

Questions

Do I need an Apple Watch?

No. Aurin works with any watch or ring that saves to Apple Health or Google Health, such as Apple Watch, Fitbit, Pixel Watch or Garmin. The Ultrahuman Ring, WHOOP and Wahoo connect directly.

Which phones does Aurin run on?

Aurin is an iPhone app. Google Health data comes through your Google account, so a Fitbit or a Pixel Watch works with it too.

What does it cost?

Aurin is free, the AI coach included. If paid features come later, you will see the price before you buy, and they will be sold only through the App Store.

I wear more than one device. Which one counts?

For your nights, Aurin uses the device you wore most nights in the last 30 days, and the others only fill the nights it missed. Your day is put together hour by hour from whichever device measured that hour. You can also pick the source yourself in Settings → Data sources → Where to take data from.

What does the AI coach see?

Only the data the question needs, when you use an AI feature such as the coach or a food photo. It goes to OpenAI, which does not use it to train its models. More in the privacy policy.

Can I delete my data?

Yes. In Settings → Privacy & data you can download all your data or delete your account with everything in it.

Is Aurin a medical device?

No. Aurin helps you plan training, food and rest. It does not diagnose or treat anything, so if you feel unwell, see a doctor.

Something doesn’t work. What now?

In the app, open Settings → Help → Report a problem and send it with diagnostics attached, or write to support@aurin.health.

Aurin

Coming soon to the App Store
TEST · staging