Best Sauna Timer App? Apps and Alternatives Compared
Sauna Assistant App
A sauna timer you can hear from the bench
Sauna Assistant plays the round and cool-down cues through your sauna's speakers, so your phone can stay outside the room.
Pay once. No subscription.
The best sauna timer is the one you can hear from the bench without looking at anything. A sand timer or your phone’s clock works for a single round. Once you do several rounds with cool-downs in between, you want a timer that knows about rounds and breaks, and that can tell you when each one ends while the phone stays outside the heat.
This guide compares the kinds of timers people use, by category rather than by brand. We make one of them, Sauna Assistant, so weigh our view accordingly.
In This Guide
- What a sauna timer needs to do
- Sauna timers compared
- Which one should you use?
- Can you take your phone into the sauna?
- What Sauna Assistant does
- Frequently asked questions
What a sauna timer needs to do
A kitchen timer counts down once. A sauna session is a sequence: warm up, a round in the heat, a cool-down, another round. A good sauna timer handles that sequence for you:
- Rounds and breaks, so you set the session once instead of restarting a countdown after every round
- A cue you notice with your eyes closed: a sound in the room, or a tap on your wrist
- No phone in the heat. Phones are not built for sauna temperatures, so the timer should work with the phone outside
- Nothing to manage mid-session. If you have to get up and press something, it is not doing its job
History is a bonus. Seeing how long and how often you actually go is useful, but it is not what makes a timer good in the moment.
Sauna timers compared
| Option | Rounds and breaks | Cue you notice inside | Phone stays outside | Keeps a history | Typical cost |
|---|---|---|---|---|---|
| Sand timer | One round at a time | None, you watch it | Yes, no phone at all | No | Low, one-off |
| Phone clock timer | One countdown | Alarm on the phone | Phone must be close enough to hear | No | Free |
| Interval timer app | Yes | On the phone, sometimes over Bluetooth | Depends on the app | Some | Free to subscription |
| Smartwatch custom workout | Yes, as intervals | Haptic tap on the wrist | Watch goes into the heat | As a workout | Free with the watch |
| Heater maker’s app | Usually heater control, not rounds | Varies | Yes | Varies | Free with the heater |
| Free web sauna timer | Rounds, breaks and prep time | Sound on the device | Device must be close enough to hear | Last three completed sessions, on this device | Free |
| Dedicated sauna app | Rounds, breaks and cool-downs | Through the sauna’s speakers, plus haptics | Yes | Yes | Varies |
Compared as of October 2026. Individual apps within each category vary, so check the one you are considering.
Which one should you use?
- You do one round now and then: a sand timer or your phone’s timer is enough. Our guide to timing sauna rounds covers how long a round should last.
- You want rounds and breaks without installing anything: the free web sauna timer runs a full session in the browser, works offline and keeps the screen awake.
- You already wear a smartwatch: a custom workout gives you haptic cues per interval. Our guide to tracking sauna on Apple Watch explains what it records and what it gets wrong.
- You sauna regularly at home and want the phone out of the room: a dedicated sauna app that plays cues through the sauna’s speakers. That is the gap Sauna Assistant was built for.
Can you take your phone into the sauna?
Better not. Apple rates iPhone for ambient temperatures of 0°C to 35°C (32°F to 95°F), and a sauna is 70-100°C. Phones that get too hot dim the screen, stop charging and eventually shut down until they cool. That is why the best setups keep the phone outside and let something else carry the cues: a speaker in the sauna, a watch on your wrist, or both.
What Sauna Assistant does
Sauna Assistant is an iPhone app that runs the whole session so you can stay present in it:
- Guided Rituals and custom sessions, with rounds, breaks and cool-downs set once
- Round and cool-down cues through your sauna’s speakers over AirPlay or Bluetooth, with ambient soundscapes in between
- Your phone stays outside. An Apple Watch is optional, for starting rounds and seeing your heart rate from the bench
- Apple Home scenes for lights and fans, if you have them
- Session history, synced through your own private iCloud, with no account
It is a one-time purchase with no subscription.
Frequently asked questions
What is the best sauna timer?
The best sauna timer is one you can notice without looking at it and that handles rounds and breaks. For a single round, a sand timer or your phone’s timer works. For full sessions with cool-downs, a dedicated sauna app or the free web sauna timer is easier.
Is there a sauna timer app?
Yes. Interval timer apps can be set up for sauna rounds, and dedicated sauna apps such as Sauna Assistant run rounds, breaks and cool-downs with cues through the sauna’s speakers. There is also a free web sauna timer that works in any browser.
Can I use my phone as a sauna timer?
Yes, but keep the phone outside. iPhone is rated for 0-35°C, far below sauna temperatures. Use a timer that plays its cues through a speaker in the sauna or on a watch, so you do not need the phone in the heat.
What is the best sauna app for iPhone?
It depends on what you want from it. For guided rounds and cool-downs with the phone outside, look for an app that plays cues through the sauna’s speakers and saves your history. We make Sauna Assistant, which does both.
Are sand timers good for the sauna?
They are simple, silent and need no phone, which is why many saunas have one on the wall. They time one round at a time and you have to watch them, so they suit occasional rounds more than full sessions.
