Comparison

RHR Tracker for Watch vs Hydro Buddy

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

Head to head
About

RHR Tracker for Watch

This app tracks your resting heart rate using data from your Apple Watch and the Health app. It monitors changes, alerts you to elevated rates, and allows symptom logging. View daily min/max values and receive morning reports comparing your RHR to your long-term average.

Highlights
  • Tracks resting heart rate changes
  • Alerts for elevated RHR
  • Symptom logging
  • Watch face complications
  • Daily min/max RHR values
  • Morning RHR reports
  • iCloud data syncing
Features
Read full description

RHR Tracker is an advanced resting heart rate tracker for the Apple Watch. RHR Tracker integrates with the Health app and uses Resting Heart Rate measurements recorded by the Apple Watch. Your resting heart rate is the average heart beats per minute measured when you’ve been inactive or relaxed for several minutes. A lower heart rate typically indicates better heart health and cardiovascular fitness. Changes in your RHR can also be an indication of illness or stress etc. Key features: -Tracks changes in your RHR. -Notifies the user if RHR is clearly elevated. -Allows to log symptoms that could be causing the changes in RHR. -Add RHR complications to your watch faces. -Collects RHR measurements within the day. Normally your Apple Watch will only store the latest daily measurement. With RHR Tracker also other daily values will be stored and you can see your daily min max values in the Apple Watch app. -Morning report that will tell you how your RHR data collected during the night or first thing in the morning compares to your long-term average. -Information read by RHR Tracker is only used locally on your device while relevant data is synced to your personal iCloud. This data can not be accessed by anyone else but you. -After your free seven day trial ends, you can continue using RHR Tracker by purchasing Lifetime access as an in-app purchase. Please note that notifications can get delayed or in some cases even dismissed if the app isn’t granted runtime in the background. By adding RHR Tracker as a complication, you will give RHR Tracker a better chance in providing notifications in time. If you have any question, please contact us at contact@sydvesti.com

About

Hydro Buddy

This app offers a straightforward way to monitor your daily water intake directly from your Apple Watch or iPhone. It prioritizes user privacy by not collecting sensitive health data, ensuring your information stays secure and under your control.

Highlights
  • Water intake tracking
  • Apple Watch integration
  • iPhone app
  • Privacy-focused
  • No health data collection
Features
Read full description

Hydro Buddy is your premier water tracking companion. Experience a no-frills method to keep track of your water intake natively on your Apple Watch, in a beautiful package that also respects your privacy. We don't collect your health metrics, so you can rest assured that your sensitive data remains within your control.

Verdict

The call

The clearest difference is price: RHR Tracker for Watch at Free against Hydro Buddy's $0.99. RHR Tracker for Watch also leads on rating (5.0 vs 3.4) and device support (4 vs 2). Hydro Buddy's advantage is in-app purchases (none vs 1) and update cadence (every 2 months vs every 37 months). On ratings volume and ads 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

RHR Tracker for Watch is free to download; Hydro Buddy costs $0.99 up front. RHR Tracker for Watch sells 1 one-off in-app purchase. Hydro Buddy asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

RHR Tracker for Watch holds the better App Store score, 5.0 against 3.4. Both are backed by a comparable volume of ratings — 6 and 5 respectively.

UpkeepUpdate frequency

RHR Tracker for Watch ships an update every 37 months, Hydro Buddy every 2 months. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

Scorecard7 real differences · 3 level
RHR Tracker for Watch versus Hydro Buddy: the parameters behind the verdict, then further details
ParameterRHR Tracker for WatchHydro Buddy
PriceFree — better$0.99
Rating5.0 (6 ratings) — better3.4 (5 ratings)
Positive reviews100.0% of reviews—
Number of ratings6 — better5
Update frequencyEvery 37 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, Apple Watch
Requires iOS15.0 — better27.0
Further details — not scored
Size2 MB1 MB
Age rating12+17+
DeveloperSydvesti OyKronovi Corporation

Customer experience

RHR Tracker for Watch

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Hydro Buddy

All ratings5 ratings
Positive60.0%
Neutral0.0%
Negative40.0%

In-app purchases

1 purchases

RHR Tracker for Watch

One-time1
  • Lifetime Access$0.99
None

Hydro Buddy

No in-app purchases

Questions

Is RHR Tracker for Watch free?
RHR Tracker for Watch is free to download, with in-app purchases available.
Is Hydro Buddy free?
Hydro Buddy costs $0.99, with no in-app purchases.
Which has better reviews, RHR Tracker for Watch or Hydro Buddy?
RHR Tracker for Watch is rated higher. RHR Tracker for Watch averages 5.0 out of 5 from 6 ratings, while Hydro Buddy averages 3.4 from 5 ratings.
Do RHR Tracker for Watch or Hydro Buddy have ads?
Neither RHR Tracker for Watch nor Hydro Buddy shows ads.
Which is updated more often, RHR Tracker for Watch or Hydro Buddy?
RHR Tracker for Watch ships an update every 37 months, and Hydro Buddy every 2 months. Most recently, RHR Tracker for Watch was updated on October 24, 2026 and Hydro Buddy on October 13, 2026.

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