Heat
Timer, heart rate and round at a glance. Mark the Aufguss with one tap.
Sauna is a ritual, not a workout.
Schwitz tracks your rounds quietly on Apple Watch and reads your evening back on iPhone.
Coming soon, free on the App Store.
What is Schwitz?
Schwitz is a calm sauna journal for iPhone and Apple Watch. The app accompanies every round through heat, cooling and rest, shows your heart rate live on your wrist, reminds you of your limit with a silent alarm and keeps the evening in a journal. With Schwitz Pro you read your sessions as a report. All data stays on your device.
Heat, cold, rest.
A round has three phases. Schwitz accompanies each one without making you look at the screen. Not a tracker that grades you, but a ritual that remembers.
Cooling
Cold plunge, shower or fresh air. The colours guide you through the phase.
Rest
Lie down, breathe, do nothing. Schwitz holds back and waits with you.
Your pulse tells the evening.
Heat: your pulse rises, round by round you see how far.
Cooling: the cold brings it back within minutes. That is the recovery the report measures.
Rest: your pulse settles, and Schwitz remembers the whole course.
Journal: in the end you note how it felt. A few words are enough.
Example course, not real data. Keep scrolling.
A quiet hand on your shoulder.
If your pulse stays above your limit, Apple Watch taps your wrist gently. No sound, no red, no panic.
- Always free
- The alarm never sits behind a paywall.
- Your limit
- You set it once. Schwitz never overrides it.
- Even on silent
- A soft double tick you feel and do not hear.
A logbook, not a dashboard.
After every session you note how it felt: a mood, a few words, done. Your sauna year reads like a diary, not a spreadsheet.
The journal is always free and unlimited.
An evening, in two pages.
Schwitz keeps what you would otherwise forget: heat, pause, Aufguss, rest and the moment after.
Your sauna year as a grid.
Every session becomes a square. Over time you see when you made room for rest and when you did not.
Example with demo data.
What an entry holds
- Your moodRelaxed, calm, energised.
- A few wordsWritten freely, not filled in.
- The session behind itPlace, duration, temperature, rounds and Aufguss come by themselves.
- Always freeUnlimited entries.
How an evening sounds.
Example entries from the app demo.
Slow evening. Quiet, warm, no thoughts.
October 3 · Forest Spa · 58 min · 85 °C · 3 rounds · 2 Aufguss
Lungs open, head quiet.
October 1 · City Thermal Spa · 43 min · 55 °C · 2 rounds
Cold plunge every round. Wide awake afterwards.
September 28 · Home · 27 min · 55 °C · 1 round
Read deeper with Schwitz Pro.
Tracking stays free, and so does the alarm. Pro is for those who want to understand what the heat does to them after the evening.
The session report
The pulse story of every session, round by round, plus your yardstick against your other sessions.
A report after every session
Right after saving, open the report with one tap.
A look-back to share
Your month or year as a calm card.
Insights into your ritual
Rhythm, dose and heat comparison. With your permission in Apple Health also the night after. The evaluation stays on your device.
Your whole sauna year
History as a chronicle. Free shows 30 days, Pro shows everything.
Also in Pro
- Daily form on Home, no score
- Weekly brief, every Monday at 9 am
- Phase targets in presets
- Max and average heart rate
- Unlimited saunas
- Family Sharing for up to 5 people
Everything stays yours.
No accounts, no servers, no tracking. Your history stays on your device and in your private iCloud.
To be honest.
The core stays free. Schwitz Pro funds development and stays fairly priced.
Free
€0
Forever. No subscription, no expiry.
- Unlimited sessions: heat, cooldown, rest
- Live heart rate and silent alarm on Apple Watch
- Aufguss log per round
- Journal, unlimited
- Apple Health sync
- Statistics and history of the last 30 days
- Up to 3 saved saunas
Schwitz Pro
€19.99 €29.99
Launch offer until 31 Dec 2026: the first year for €19.99, once per Apple ID. Then €29.99 a year, that is €2.50 a month. Cancel anytime.
€3.99 / month
€47.88 a year, no launch discount. Yearly (€29.99) saves 37%.
Everything in Free, plus:
- Session report: pulse story and your yardstick
- Insights: recovery, afterglow on sleep, resting heart rate and HRV, heat comparison, rhythm
- Report after every session and a shareable look-back
- Daily form on Home and a weekly brief on Mondays
- Max and average heart rate in Analysis
- Phase targets in presets
- Unlimited saved saunas
- History beyond 30 days, your whole sauna year
- Family Sharing for up to 5 people
Subscriptions renew automatically and can be cancelled anytime in iOS Settings.
Founders Lifetime
€74.99
One time. Launch window only, limited to the first 500 buyers.
- All Pro features, forever
- No subscription
- Family Sharing for up to 5 people
Common questions.
Do I need an Apple Watch?
No. The iPhone alone handles most things: start a session, log rounds and breaks, write your journal. The Watch is the optional precision mode with live heart rate, quiet haptics and phase changes on the wrist.
What stays free?
Sessions, phases, Aufguss, live heart rate, the silent alarm, the journal and Apple Health sync, unlimited and forever. Statistics and history cover the last 30 days, and you can save up to three saunas.
What do I get with Schwitz Pro?
The session report with your pulse story, insights into your ritual including the afterglow on sleep, resting heart rate and HRV, the shareable look-back, daily form and weekly brief, phase targets, unlimited saunas and history beyond 30 days.
Where does my health data go?
Nowhere. Schwitz reads sleep, resting heart rate and HRV from Apple Health only with your permission and evaluates them on your device. There is no Schwitz server for user data.
Does Schwitz sync with Apple Health?
Yes. Heart rate and workout entries are written to Apple Health at the end of each session, if you choose.
Is Schwitz a medical device?
No. Schwitz does not replace medical advice. The heart rate alarm is a reminder, not a safeguard. Listen to your body.
When does Schwitz launch?
Soon. Sign up below and you get an email at launch, or write to [email protected].
Join the first Aufguss.
Schwitz is coming to the App Store soon. Sign up and you get an email at launch. No ads.