Comparison

Powrlink Light vs Sauna Flow

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Powrlink Light

Features
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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!

About

Sauna Flow

Features
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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: 0–35°C / 32–95°F); keep it somewhere safe. Protecting your device is your responsibility.

Screenshots

Powrlink Light3 screens
Sauna Flow4 screens

Verdict

The call

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

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Sauna Flow sells 1 one-off in-app purchase. Powrlink Light asks for nothing beyond the download.

UpkeepUpdate frequency

Powrlink Light ships an update every 3 months, Sauna Flow every 3 weeks. Both last shipped on October 30, 2026.

Scorecard3 real differences Ā· 3 level
Powrlink Light versus Sauna Flow: the parameters behind the verdict, then further details
ParameterPowrlink LightSauna Flow
PriceFreeFree
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS15.1 — better17.6
Further details — not scored
Size54 MB7 MB
Age rating4+17+
Developeraerobis fitness GmbHAndroa Inc.

In-app purchases

None

Powrlink Light

No in-app purchases

1 purchases

Sauna Flow

One-time1
  • SaunaFlow Premium$2.99

Questions

Is Powrlink Light free?
Powrlink Light is free to download, with no in-app purchases.
Is Sauna Flow free?
Sauna Flow is free to download, with in-app purchases available.
Do Powrlink Light or Sauna Flow have ads?
Neither Powrlink Light nor Sauna Flow shows ads.
Which is updated more often, Powrlink Light or Sauna Flow?
Powrlink Light ships an update every 3 months, and Sauna Flow every 3 weeks. Most recently, Powrlink Light was updated on October 30, 2026 and Sauna Flow on October 30, 2026.

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