Comparison

myRhythmWatch vs REPACE

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

Head to head
About

myRhythmWatch

This app helps you understand and track your body's natural 24-hour cycles. By wearing an Apple Watch continuously, you can monitor your circadian rhythms, which are crucial for overall health and well-being. Identifying and improving these rhythms can lead to better sleep and health outcomes.

Highlights
  • Circadian rhythm monitoring
  • Apple Watch integration
  • HealthKit synchronization
  • Rhythm stability assessment
  • Health outcome improvement insights
Read full description

Our physical, emotional, and brain functions have 24-hour rhythms, also called circadian rhythms. These rhythms keep us in sync with the external world. Circadian rhythm disruption can contribute to sleep problems, diabetes, cognitive impairment, depression, dementia, and other health problems. MyRhythmWatch allows users to assess and track their circadian rhythms. Doing so - understanding your rhythms - is the first step towards improving them and optimizing your health. For MyRhythmWatch to work, wear an Apple Watch continuously for at least three days and nights. Don’t remove it when you sleep. Only brief periods of watch removal are OK, for example, we recommend taking your watch off and charging it while you bathe; or when for brief periods when you're settling down and won't be active anyway. Internet and Bluetooth connections are required to sync your data. After getting good data for a minimum of three days, you’ll be able to see your MyRhythmWatch scores. Weaker (smaller) rhythms and unstable (irregular) rhythms have been associated with health problems, and modifying weak/aberrant rhythms may improve wellbeing and health outcomes. Keep an eye on your rhythms with MyRhythmWatch. This app integrates with HealthKit functionality in the user interface. **Although this application is currently free to download, your registration must be confirmed before use. If you are interested in using MyRhythmWatch, please email Dr. Stephen Smagula (Stephen.Smagula@pitt.edu) describing your interest, including whether it is for personal use, research, or implementation in a clinical practice.**

About

REPACE

Features
Read full description

REPACE can be your “Personal Workout Coach” Stop working out by running your longest and fastest miles. REPACE, your Personal Workout Coach, will guide you with a personalized workout program that takes into account your endurance and health levels by measuring your biometric data. You will experience a dramatic change in your physical performance with REPACE on your side. We integrate with the health app (HealthKit) to read and track your heart rate data and show them in a beautiful way (Heart rate functions in the app can be imported in conjunction with Apple Watch.)

Screenshots

myRhythmWatch4 screens
REPACE4 screens

Verdict

The call

The clearest difference is iOS requirement: REPACE at 13.0 against myRhythmWatch's 15.5. On price, update cadence, ads and in-app purchases 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

myRhythmWatch ships an update fortnightly, REPACE every 3 weeks. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

Scorecard1 real difference · 8 level
myRhythmWatch versus REPACE: the parameters behind the verdict, then further details
ParametermyRhythmWatchREPACE
PriceFreeFree
Rating5.0 (4 ratings) — better—
Number of ratings4 — better—
Update frequencyFortnightly — betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPod, Apple WatchiPhone, iPod, Apple Watch
Requires iOS15.513.0 — better
Further details — not scored
Size26 MB92 MB
Age rating4+4+
DeveloperUniversity of PittsburghOBELAB

In-app purchases

None

myRhythmWatch

No in-app purchases

None

REPACE

No in-app purchases

Questions

Is myRhythmWatch free?
myRhythmWatch is free to download, with no in-app purchases.
Is REPACE free?
REPACE is free to download, with no in-app purchases.
Do myRhythmWatch or REPACE have ads?
Neither myRhythmWatch nor REPACE shows ads.
Which is updated more often, myRhythmWatch or REPACE?
myRhythmWatch ships an update fortnightly, and REPACE every 3 weeks. Most recently, myRhythmWatch was updated on October 24, 2026 and REPACE on October 13, 2026.

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