Comparison

HeartBreath 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

HeartBreath HRV

This app uses your phone's camera to measure heart rate variability through guided slow breathing exercises. It provides biofeedback to help you train your autonomic nervous system for rest and relaxation. Track your progress and optimize your breathing for better well-being.

Highlights
  • Guided slow breathing exercises
  • Heart rate variability measurement via camera
  • Customizable visual and auditory biofeedback
  • Live heart rate and variability display
  • Optimal breathing speed determination
  • Long-term trend evaluations
  • Apple Health integration
Features
Read full description

Did you know that your heart beats faster during inhalation and slower during exhalation AND did you know that this is good for you? The technical term is RSA (respiratory sinus arrhythmia) - a good arrhythmia controlled by your autonomic nervous system. High variability of the heart rate stands for a good autonomic balance and activity of the parasympathetic nervous system (rest and relaxation nerve). HeartBreath is a biofeedback tool, that addresses exactly this relationship between breathing and heart rate. The app guides you through a simple slow-breathing exercise (with pictures and sounds), while detecting and displaying the intervals between your heartbeats. You can measure, train and evaluate your personal status. No additional hardware devices are needed. HeartBreath is able to detect heartbeats by positioning your finger on the lens of the phone’s camera. KEY FEATURES: Integrated VaYou Sound Flows, which provide an exceptional sound experience on acoustic pacing. High quality and customizable control of the bio-feedback exercise with pictures (you can work with pictures from your photo library) and sounds. Live display of the current heart rate and variability values while recording. In just a few breaths, HeartBreath is able to compute your resting heart rate. No additional hardware is needed. The calculation works with a finger on the lens of the iPhone’s (or iPod’s) camera (for iPad only device models with flash). Optionally, an external heart rate monitor can be used. For compatible devices (Polar H10) display/recording/evaluation of true ECG data is supported. As a special extra, the app allows the comparison of data between the finger on the camera and the heart rate monitor. Unlike many other HRV apps, HeartBreath offers a precise visualization for every single heartbeat and, if necessary, tools for interactive correction of the beats. This is very important for the high reliability of HRV parameters, since single ectopic heartbeats or data artifacts can result in strange adulteration of HRV values. Integrated tools to determine your optimal breathing speed. Various studies show that each person has an individual optimal RSA breathing rate in the range between 4 and 7 breaths per minute. Trend evaluations over longer periods of time. HeartBreath integrates with the Apple Health app. Privacy is important to us! The app does not require registration and you have full control over the data of your sessions, which is only stored on your phone.

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

HeartBreath HRV4 screens
SleepingTemp3 screens

Verdict

The call

The clearest difference is in-app purchases: SleepingTemp at none against HeartBreath HRV's 4. SleepingTemp also leads on update cadence (every 5 days vs every 3 months) and price ($2.99 vs $8.99). HeartBreath HRV's advantage is review sentiment (67% vs 45%) and iOS requirement (14.0 vs 17.0). On ads 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

HeartBreath HRV costs $8.99 and SleepingTemp $2.99 up front. HeartBreath HRV sells 4 one-off in-app purchases. SleepingTemp asks for nothing beyond the download.

UpkeepUpdate frequency

HeartBreath HRV ships an update every 3 months, SleepingTemp every 5 days. The most recent releases landed on November 11, 2026 and November 7, 2026 respectively.

Scorecard6 real differences · 4 level
HeartBreath HRV versus SleepingTemp: the parameters behind the verdict, then further details
ParameterHeartBreath HRVSleepingTemp
Price$8.99$2.99 — better
Rating4.6 (55 ratings) — better—
Positive reviews66.7% of reviews — better45.5% of reviews
Number of ratings55 — better—
Update frequencyEvery 3 monthsEvery 5 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPodiPhone, Apple Watch
Requires iOS14.0 — better17.0
Further details — not scored
Size198 MB17 MB
Age rating4+4+
DeveloperErwin GablerKevin Reutter

Customer experience

HeartBreath HRV

All ratings54 ratings
Positive92.6%
Neutral1.9%
Negative5.6%
Written reviews24 reviews
Positive66.7%
Neutral4.2%
Negative29.2%

SleepingTemp

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

In-app purchases

4 purchases

HeartBreath HRV

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

SleepingTemp

No in-app purchases

Questions

Is HeartBreath HRV free?
HeartBreath HRV costs $8.99, and also offers in-app purchases.
Is SleepingTemp free?
SleepingTemp costs $2.99, with no in-app purchases.
Do HeartBreath HRV or SleepingTemp have ads?
Neither HeartBreath HRV nor SleepingTemp shows ads.
Which is updated more often, HeartBreath HRV or SleepingTemp?
HeartBreath HRV ships an update every 3 months, and SleepingTemp every 5 days. Most recently, HeartBreath HRV was updated on November 11, 2026 and SleepingTemp on November 7, 2026.

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