Sauna Flow: Sauna Timer & Log

Heart Rate Zones & Rounds

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

New: round mode for sauna, cool-down and rest, a session calendar with streaks and a weekly goal, and heart rate zones based on your own max heart rate. Time your sauna sessions from your wrist and see your heart rate zone as you go. Sauna Flow is a sauna timer for Apple Watch that keeps a clear record of every session on your iPhone. Set a target time, start on your Apple Watch, and stay focused on the heat. Afterwards, your iPhone shows how the session went and how your routine is building week by week. ■ Round mode • Plan 1 to 5 rounds of sauna, cool-down and rest on your Apple Watch. • Each sauna phase starts when you tap. Cool-down and rest move on automatically, with a haptic at each change. • Your iPhone shows a breakdown for every round. ■ Live heart rate on your Apple Watch • See your current heart rate and zone during the session, with optional alerts when your zone changes. • Zones are based on a max heart rate you choose: the default, an age-based estimate, or your own value. ■ Your sauna routine • A session calendar that marks the days you went. • Current and longest streak, plus a weekly goal you set (1 to 14 sessions). • Optional reminders on the weekdays and at the time you pick. They stay off unless you turn them on. • Session details: duration, average and highest heart rate, time in each zone, plus effort and stability scores for single sessions. • Export your sessions to CSV or share a session card. ■ On your watch face • Add the Sauna Flow complication to open the app in one tap. ■ Sessions you can count on • Each session stays on your Apple Watch until your iPhone confirms it is saved, and is resent automatically. • If the app closes mid-session, the session is recovered and saved as interrupted. • If your Apple Watch gets too hot, it warns you. If it overheats, the session is saved and ended. ■ Apple Health • Sessions and heart rate data are saved to Apple Health. ■ Your language • Korean, English, German, Finnish, Japanese, Dutch and Russian. Choose in the app's settings; your Apple Watch follows. ■ Premium • Your 3 most recent sessions are always available. Sauna Flow Premium, an in-app purchase, unlocks your full session history and full export. ■ What you need • Apple Watch with watchOS 10 or later to record sessions. ■ Please note • Sauna Flow is not a medical device and does not provide medical advice. Heart rate zones are informational estimates, not medical measurements. • If you have a cardiovascular condition or other health concerns, consult your doctor before using a sauna. • Stay hydrated and avoid overheating. Stop your session immediately if you feel unwell. • Apple Watch and iPhone are not designed for extreme heat. Do not expose your device to sauna temperatures beyond its operating range (Apple Watch: 0–35°C / 32–95°F); keep it somewhere safe. Protecting your device is your responsibility.

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This update adds round mode and a session calendar, and makes syncing between Apple Watch and iPhone more dependable. • Round mode on Apple Watch: sauna, cool-down and rest across 1–5 rounds, with a per-round breakdown on iPhone. • Session calendar, days in a row, a weekly session goal and session reminders. Notification permission is requested only when you turn reminders on. • Choose the max heart rate used for zones: default, by age or manual (an estimate). • A watch face complication that opens the app in one tap. • Sessions recorded while your iPhone is out of reach stay on the watch and are sent when it reconnects. Duplicate copies of a session on iPhone are merged into one. • Apple Watch reliability: the timer keeps accurate time while the screen is off, and the watch warns you when it runs hot. At a critical temperature, the session is saved and ended to protect the device. Sessions interrupted by the app closing are recovered when you reopen it. • Compatibility: the minimum version for the Apple Watch app is now watchOS 10. Also: VoiceOver labels, a delete confirmation in session details, refreshed wording (sessions, zone names) and translation fixes.

Version 1.1.0

The developer, Androa Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Health & Fitness

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
Androa Inc.
Size
7.6 MB
Category
Health & Fitness
Compatibility
Requires iOS 17.6 or later.
  • iPhone
    Requires iOS 17.6 or later.
  • iPad
    Requires iPadOS 17.6 or later.
  • Mac
    Requires macOS 14.6 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.3 or later.
  • Apple Watch
    Requires watchOS 10.0 or later.
Languages
English and 6 more
  • English, Dutch, Finnish, German, Japanese, Korean, Russian
Age Rating
16+
  • 16+
  • Learn More
  • Frequent
    Medical Treatment information

    Contains
    Health or Wellness Topics
In-App Purchases
Yes
Copyright
© '2025 Androa Inc.'
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More

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