Sauna tracker · iPhone & Apple Watch

The sauna app for iPhone & Apple Watch.

Time each round. Keep your sessions. Compare the Apple Health data available on your iPhone.

Download on theApp Store

Scan to download on your iPhone

4.0 App StoreFree download · iPhone, Apple Watch & Mac · Requires iOS 26.0 or later

The sauna timer: round 1, 2 minutes 23, deep heat
The session on Apple Watch: round 2, 132 BPM, zone 2

On your iPhone. On your wrist.

The score after a session: 100, heat load optimal
iPhone

All your sauna in one place

  • Round and break timer, on the Lock Screen too
  • A score out of 100 after every session
  • Sleep, HRV and recovery on sauna days
  • Your progress, week after week
Everything on iPhone
The heart rate alert on Apple Watch: 164 BPM, take a break
Apple Watch

Your session on the wrist

  • Round, time left and heart rate at a glance
  • A tap on the wrist above your heart rate limit
  • Heart rate recovery when you step out
  • Saved to Apple Health
Everything on Apple Watch
Privacy

Your sessions stay on your device.

Your heart rate is nobody’s business. Sauna Metrics has no account: your sessions live on your iPhone, and Apple Health is read right there.

Read the privacy policy
  • No account, no cloud sync

    Sessions, notes and your body profile are stored on your iPhone only. Nothing is synced to us.

  • Apple Health, read on device

    Heart rate, HRV and sleep are read locally to compare with your sessions, never uploaded.

  • No ads, no tracking

    No advertising SDK and no tracking. Usage statistics stay off unless you agree, and never include your sessions.

Reviews

What people say on the App Store.

Reviews copied word for word from the App Store, in the language they were written in: the most recent ones, whatever their rating. We don’t check them beyond what Apple does.

4.0App Store
Very good for beginners

Started taking track of my sauna sessions and this seem to be working well

Maggievau01 · App Store · Italy · Oct 17, 2026
Add cold plunge

Add cold plunge

W_G01 · App Store · United States · Oct 17, 2026
Sauna

Perfekte App für die Sauna

Matthias Meißner · App Store · Germany · Oct 31, 2026
Super pratique

Parfait

Arthurprsl · App Store · France · Oct 20, 2026
Die perfekte App für Saunagänger!

Für mich als regelmäßigen Saunagänger die perfekte App! Alles, was man braucht, lässt sich übersichtlich tracken – von den Saunagängen bis hin zu den verwendeten Utensilien. Das Tracking ist super durchdacht, die Benutzeroberfläche modern und intuitiv. Man merkt, dass hier viel Liebe zum Detail drinsteckt. Klare Empfehlung für alle Saunafans!

Golfcaddy123456 · App Store · Germany · Oct 20, 2026

Your review here? Sauna Metrics is made by one independent developer. A few words on the App Store help other sauna lovers find it.Write a review

Field notes

From the hot room.

All articles →
Research5 min read

Sauna benefits, sorted by evidence

Heart, sleep, mood, recovery: what the studies show and what they do not.

READ →
Research4 min read

Does a sauna burn calories?

Why the scale lies after a session, and what the heat really costs your body.

READ →
Research5 min read

Sauna etiquette, country by country

What to wear, when to shower, who throws the water: the rules in six sauna cultures.

READ →

Turn every session into data.

Free to download. Sauna Metrics Pro adds the Apple Watch app, the Health analyses, the training log and the recaps, with a free week to try. No account and no ads.

Download on theApp Store

Scan to download on your iPhone

The live session on iPad
Also on iPad, same app, same data.