Comparison

BreathTuner HRV vs SleepingTemp

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

Head to head
About

BreathTuner HRV

Discover your optimal breathing rate to harmonize your mind and body. This app analyzes your breathing and heart rate variability to guide you to your personal resonance frequency. Enhance meditation and daily exercises for improved well-being.

Highlights
  • Find personal optimal breathing frequency
  • Analyze breathing and heart rate variability (HRV)
  • Guided breathing exercises
  • Integrates with Apple Health
  • Uses iPhone camera for pulse detection
  • Optional chest strap support
Read full description

Already breathed today? Probably! We are always breathing, but mostly unconsciously. What a pity! Because we can achieve so many positive things for ourselves through breathing: When you breathe at your optimal breathing rate, your heartbeat synchronizes with your breathing and beneficial, balancing and healing processes are set in motion that bring both your psyche and your body into optimal balance. BreathTuner is the first and only app that allows you to find your personal and optimal breathing frequency. It is also called resonance frequency and is determined by analyzing breathing and heart rate variability (HRV) simultaneously. Take the basic test and you'll know how to set your Apple Watch for Breathe (Meditation) to get the most benefit for you! Or do you use one of the many Breath-Pacers or do daily exercises to improve heart rate variability? Even then, you should use BreathTuner to find out at what breathing rate your HRV is optimal. No other app can currently give you this fully automated functionality. Did we mention that the basic functionality costs next to nothing? BreathTuner uses scientifically proven algorithms, is based on the latest research and uses high quality and proven HRV technology from our HeartBreath app. BreathTuner guides you through a series of simple exercises while being paced by the soothing breath sounds of the VaYou Biofeedback app. The BreathTuner measurement is at once a relaxing and even meditative exercise that enjoyably centers your mind on the flow of your breath. In doing so, the app measures your abdominal breathing and heart activity, and it does it all using only your iPhone! For this, we went to the technical limits. You don't need an extra sensor, but you can use a chest strap like the Polar H10 as an alternative for pulse detection. This captures a real ECG and we analyze it for the HRV calculation. But BreathTuner works just as well with the finger pulse measured via the iPhone camera. And if you want to become a BreathTuner Pro-User, even more detailed analysis is available via an In-App Purchase. You can then determine your individual breathing resonance frequency with very high accuracy! BreathTuner was developed with the utmost care by the makers of the apps HeartBreath HRV and VaYou Breath Biofeedback. You get a quality product at the cutting edge of scientific research with the most beneficial breathing sounds available in the world today. BreathTuner integrates with the Apple Health app (Mindful Minutes). To breathe costs nothing, also air is fortunately still free and BreathTuner is at your disposal - almost free! Awaken your full potential - and use your individual and optimal breathing frequency - best right here, right now. In this spirit - all the best on the way to you and don't forget to always take a deep breath - your BreathTuner

About

SleepingTemp

Monitor your wrist temperature overnight with this Apple Watch app. Gain insights into your sleep patterns and identify potential disruptions affecting sleep quality. Understand how temperature fluctuations relate to your body's internal state for better rest.

Highlights
  • Sleep temperature monitoring
  • Wrist temperature insights
  • Sleep disruption identification
  • Apple Watch integration
  • Sleep focus activation tracking
Features
Read full description

Introducing SleepingTemp , an app that provides you with valuable insights into your sleep wrist temperature. SleepingTemp is a simple and intuitive app that you can install on your Apple Watch. By monitoring your wrist temperature, SleepingTemp can help you identify any issues that may be preventing you from getting the best possible sleep. For example, if your wrist temperature is consistently too high or too low, this may indicate that you are not sleeping deeply enough or that your sleep is being disrupted by external factors. The temperature on the wrist is related to the body temperature. It is measured via the Apple Watch while you sleep. The wrist temperature shows an average of several measurements taken while you are asleep and when the sleep focus is activated. Requirements: - An Apple Watch Series 8 or Apple Watch Ultra. - Sleep must be set up with Track Sleep with Apple Watch enabled. - Sleep Focus must be enabled for at least 4 hours a night for about 5 nights.

Screenshots

BreathTuner HRV4 screens
SleepingTemp3 screens

Verdict

The call

The clearest difference is in-app purchases: SleepingTemp at none against BreathTuner HRV's 4. SleepingTemp also leads on update cadence (every 5 days vs every 3 months) and review sentiment (45% vs 21%). BreathTuner HRV's advantage is chart position (#153 vs unranked) and iOS requirement (14.0 vs 17.0). On ads, monetization model and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

BreathTuner HRV costs $3.99 and SleepingTemp $2.99 up front. BreathTuner HRV sells 4 one-off in-app purchases. SleepingTemp asks for nothing beyond the download.

UpkeepUpdate frequency

BreathTuner HRV ships an update every 3 months, SleepingTemp every 5 days. Both last shipped on November 7, 2026.

Scorecard6 real differences · 5 level
BreathTuner HRV versus SleepingTemp: the parameters behind the verdict, then further details
ParameterBreathTuner HRVSleepingTemp
Price$3.99$2.99 — better
Rating4.4 (38 ratings) — better—
Positive reviews21.4% of reviews45.5% of reviews — better
Number of ratings38 — better—
Update frequencyEvery 3 monthsEvery 5 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidPaid
Best chart rank#153 — better—
DevicesiPhone, iPodiPhone, Apple Watch
Requires iOS14.0 — better17.0
Further details — not scored
Size156 MB17 MB
Age rating4+4+
DeveloperErwin GablerKevin Reutter

Customer experience

BreathTuner HRV

All ratings38 ratings
Positive81.6%
Neutral10.5%
Negative7.9%
Written reviews14 reviews
Positive21.4%
Neutral21.4%
Negative57.1%

SleepingTemp

Written reviews22 reviews
Positive45.5%
Neutral9.1%
Negative45.5%

In-app purchases

4 purchases

BreathTuner HRV

One-time4
  • Eternity VaYou Sound$3.99
  • Wind & Waves VaYou Sound$3.99
  • Burma Bliss VaYou Sound$3.99
Show 1 more
  • BreathTuner - Pro$8.99
None

SleepingTemp

No in-app purchases

Questions

Is BreathTuner HRV free?
BreathTuner HRV costs $3.99, and also offers in-app purchases.
Is SleepingTemp free?
SleepingTemp costs $2.99, with no in-app purchases.
Do BreathTuner HRV or SleepingTemp have ads?
Neither BreathTuner HRV nor SleepingTemp shows ads.
Which is updated more often, BreathTuner HRV or SleepingTemp?
BreathTuner HRV ships an update every 3 months, and SleepingTemp every 5 days. Most recently, BreathTuner HRV was updated on November 7, 2026 and SleepingTemp on November 7, 2026.

Other comparisons