Powrlink Light vs Sauna Flow
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
Powrlink Light
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Elevate your fitness with the Powrlink Light app! Track strePowrlinknkal-time, pair up to two Powrlink Sensors to measure resistance, analyze workouts with clear graphs, and export data as CSV for deeper insights in tools like Excel - perfect for functional training anywhere. Note: A Powrlink Sensor is required to use this app; get yours at aerobis.com to start measuring your progress today!
Sauna Flow
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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. ā 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. ā 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. ā 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. ā On your watch face ⢠Add the Sauna Flow complication to open the app in one tap. ā 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. ā Apple Health ⢠Sessions and heart rate data are saved to Apple Health. ā Your language ⢠Korean, English, German, Finnish, Japanese, Dutch and Russian. Choose in the app's settings; your Apple Watch follows. ā Premium ⢠Your 3 most recent sessions are always available. Sauna Flow Premium, an in-app purchase, unlocks your full session history and full export. ā What you need ⢠Apple Watch with watchOS 10 or later to record sessions. ā 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: 0ā35°C / 32ā95°F); keep it somewhere safe. Protecting your device is your responsibility.
Screenshots
Verdict
The clearest difference is in-app purchases: Powrlink Light at none against Sauna Flow's 1. Powrlink Light also leads on iOS requirement (15.1 vs 17.6). Sauna Flow's advantage is update cadence (every 3 weeks vs every 3 months). On price, ads and device support there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Sauna Flow sells 1 one-off in-app purchase. Powrlink Light asks for nothing beyond the download.
Powrlink Light ships an update every 3 months, Sauna Flow every 3 weeks. Both last shipped on October 30, 2026.
| Parameter | Powrlink Light | Sauna Flow |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Every 3 weeks ā better |
| Ads | No | No |
| In-app purchases | No ā better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 15.1 ā better | 17.6 |
| Further details ā not scored | ||
| Size | 54 MB | 7 MB |
| Age rating | 4+ | 17+ |
| Developer | aerobis fitness GmbH | Androa Inc. |
In-app purchases
Powrlink Light
No in-app purchases
Sauna Flow
- SaunaFlow Premium$2.99
Questions
Is Powrlink Light free?
Is Sauna Flow free?
Do Powrlink Light or Sauna Flow have ads?
Which is updated more often, Powrlink Light or Sauna Flow?
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