Comparison

HRV Tracker for Watch vs Training Today

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

Head to head
About

HRV Tracker for Watch

Monitor your body's stress levels and recovery by tracking heart rate variability (HRV) using your Apple Watch. Analyze trends, compare HRV to other health metrics, and receive personalized notifications to understand how daily activities impact your well-being.

Highlights
  • Track short-term and long-term HRV trends
  • Compare HRV to activity, sleep, and resting heart rate
  • Receive HRV change notifications on Apple Watch
  • View HRV Trend Summary (experimental)
  • Integrates with Apple Health app
  • Capture HRV data via Mindfulness app
Features
Read full description

Heart Rate Variability (HRV) measurements recorded by your Apple Watch can provide insight into the stress your body is experiencing. By using HRV Tracker to track short-term readings and long-term trends, you can see how factors such as daily workload, workouts, and sleep affect your body's readiness, recovery, and stress. Simply put, the higher your HRV, the better. ***Requires Apple Watch with watchOS 10 or later*** HRV Tracker for Watch integrates with the Health app and uses data stored in the Health app. To ensure your Apple Watch can record HRV measurements, open the Health app on your iPhone to check for existing data: Health app > Browse > Heart > Heart Rate Variability. In addition to automatic recordings, you can also use the Mindfulness app on your Apple Watch to capture new HRV data. Start a Breathe session, and once it ends, a new HRV measurement will appear in HRV Tracker. ***Compare HRV to Other Key Metrics*** Identify potential causes for changes in your HRV with Comparison Charts. -Compare your HRV to relevant health metrics such as activity, sleep, and resting heart rate. ***Follow Long-Term HRV Trends*** Track long-term HRV trends on your iPhone and compare short-term readings to your long-term averages. -Experience smarter insights with the new HRV Trend Summary feature (experimental). Available on Apple Intelligence powered devices running iOS 26. ***Get Notified on Your Apple Watch*** HRV Tracker helps you spot changes in your HRV by monitoring your data in the background and notifying you when your HRV falls below or rises above your preferred levels. -Tracks individual readings as well as 24-hour and 7-day averages. -You can customize the default notification thresholds in the Apple Watch app. -For notifications to work properly, add HRV Tracker to your Watch Face. -Note that notifications may be delayed due to factors like low battery. ***And More*** Track your HRV in multiple ways on your Apple Watch and iPhone. -Choose from various Home Screen widgets or Watch Face complications -Customize charts and views in settings -Scroll and tap on charts for additional insights ***Privacy*** Your privacy is really important to us — we do not collect any data from this app. ***How Is It Measured?*** HRV Tracker uses heart rate variability measurements calculated by detecting the variation between individual heartbeats. Your Apple Watch automatically measures HRV in the background and stores it in HealthKit. HealthKit uses SDNN (Standard Deviation of NN intervals), which reflects the standard deviation of time between normal heartbeats (measured in milliseconds). Please note that many of the features mentioned above are available only to subscribers. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula If you have any questions, we’re happy to help: contact@sydvesti.com

About

Training Today

This app analyzes your Apple Watch health data to provide a daily readiness to train score. It helps prevent overtraining injuries and guides your training intensity, offering insights into your body's recovery and performance potential.

Highlights
  • Calculates daily readiness to train (RTT) score
  • Multi-day RTT score chart
  • Independent Apple Watch app
  • Uses HRV, workout detection, and custom algorithm
  • Automatic data outlier filtering
  • iPhone companion app with tutorial
  • Complication support for quick RTT glance
Features
Read full description

Training Today constantly monitors your Health Data from Apple Watch to determine your readiness to train (RTT) each day and throughout the day. Training Today can help you stay safe from overtraining injury or let you know if it’s the best time to work hard, take it easy, or have a rest day. Developed with British Triathlon Coaches and tested on athletes of varying ability, we have taken a holistic view of your life by using the advanced capabilities of Apple Watch to monitor your health 24hrs a day and process that data to create a simple, accurate readiness to train (RTT) score to help you reach your training goal. Key Features =============== * Calculates your readiness to train (RTT) score automatically throughout the day. * Presents a multi-day chart showing how your score is changing. * Using the Digital Crown, you can scroll through previous RTT scores on the chart. * Runs independently on Apple Watch; no need for iPhone to be present. * iPhone companion app also shows your current RTT score and tutorial. * Full support for all complications means you can quickly glance at your watch and see your current RTT score at any time. * We use Heart Rate Variability (HRV), Workout detection and our own algorithm to determine your RTT score. * Automatic filtering of outlier data (e.g. very larger variances in data) * Workout detection - we detect when you have completed a workout logged to Apple Health and show it on the chart. Tap the screen when you see one to get details of the workout and better understand the impact on your RTT score. The following are available in the subscription version: * Siri support - ask, "Hey Siri, what's my Training Today score?" or "Hey Siri, what's my Training Today RTT?" to see your score and current weekly chart * Siri shortcuts - get your current Training Today score as input for automation you can create in Apple Shortcuts. * Apple Watch notifications when your RTT drops by a configured amount compared to your 4-day average. * View your RTT chart on your iPhone as well as your Apple Watch * View your complete baseline HRV and RHR (Resting Heart Rate) data in the iPhone app and scroll through Years, Months and the related weekly RTT charts. * Fine-tune your RTT score using Smoothing and Intensity Settings on your iPhone * Add widgets to your iPhone home screens and lock screens showing your current RTT score and chart. * Apple Watch Smart Stack Widget * Compare your Resting Heart Rate data with your RTT and HRV scores. * Notifications on Apple Watch when your RTT changes over a configured value compared to your 4-day average. * More features with each release More info at https://TrainingTodayApp.com For best performance, wear your Apple Watch as much as possible and overnight if you can. The Training Today iPhone and Apple Watch app (“App)” provides only information, is not medical or treatment advice, and may not be treated as such by the user. As such, this App may not be relied upon for the purposes of medical diagnosis or as a recommendation for medical care or treatment. The information on this App is not a substitute for professional medical advice, diagnosis, or treatment. All content, including text, graphics, images, and information, contained on or available through this App is for general information purposes only. Note: Original Apple Watches (Series 0) are not supported because they do not support HRV or watchOS 6 or later, and users under 16 are not supported because HRV data is unavailable. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula

Screenshots

HRV Tracker for Watch4 screens
Training Today4 screens

Verdict

The call

The clearest difference is monetization model: Training Today at freemium against HRV Tracker for Watch's subscription. Training Today also leads on review sentiment (53% vs 42%) and iOS requirement (16.0 vs 18). On price, rating, ratings volume and update cadence 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. HRV Tracker for Watch sells 2 in-app purchases, starting at $2.99 per month and Training Today sells 4 in-app purchases, starting at $2.95 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.5 for HRV Tracker for Watch against 4.6 for Training Today. Both are backed by a comparable volume of ratings — 939 and 2.6K respectively. Written reviews are what separate them: 42% of HRV Tracker for Watch's written reviews are positive against 53% of Training Today's.

UpkeepUpdate frequency

HRV Tracker for Watch ships an update monthly, Training Today every 6 weeks. The most recent releases landed on September 23, 2026 and September 24, 2026 respectively.

Scorecard3 real differences · 7 level
HRV Tracker for Watch versus Training Today: the parameters behind the verdict, then further details
ParameterHRV Tracker for WatchTraining Today
PriceFreeFree
Rating4.5 (939 ratings)4.6 (2.6K ratings) — better
Positive reviews42.2% of reviews52.7% of reviews — better
Number of ratings9392.6K — better
Update frequencyMonthly — betterEvery 6 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFreemium — better
DevicesiPhone, Apple WatchiPhone, Apple Watch
Requires iOS1816.0 — better
Further details — not scored
Size22 MB41 MB
Age rating4+4+
DeveloperSydvesti OyBetoli Ltd

Customer experience

HRV Tracker for Watch

All ratings939 ratings
Positive86.8%
Neutral5.4%
Negative7.8%
Written reviews83 reviews
Positive42.2%
Neutral7.2%
Negative50.6%

Training Today

All ratings2,626 ratings
Positive89.5%
Neutral4.5%
Negative6.1%
Written reviews313 reviews
Positive52.7%
Neutral11.5%
Negative35.8%

Bugs and requests

HRV Tracker for Watch

Not enough reviews yet to summarise bugs or requests.

Training Today

Reported bugs

4 issues
  • Crashes on launch after purchasing subscription
  • Widgets not working after recent updates
  • Discrepancies between data shown on iPhone and Apple Watch
  • Inability to get HRV readings without using the Breathe app

Requested features

6 requests
  • Extend the number of days shown on the chart
  • Add more data points like sleep and oxygen levels
  • Provide more detailed explanations of the metrics and how they are calculated
  • Improve the Apple Watch complication to update more frequently
  • Integrate with other fitness platforms like Garmin and Polar
Show 1 more
  • Add training plans that adapt to HRV data

In-app purchases

2 purchases

HRV Tracker for Watch

Subscriptions2
  • Monthly Premium$2.991 Month
  • Yearly Premium$19.991 Year
4 purchases

Training Today

Subscriptions2
  • Monthly subscription$2.951 Month
  • Yearly subscription$29.991 Year
One-time2
  • Additional charts$5.99
  • Lifetime$59.99

Questions

Is HRV Tracker for Watch free?
HRV Tracker for Watch is free to download, with in-app purchases available.
Is Training Today free?
Training Today is free to download, with in-app purchases available.
Which has better reviews, HRV Tracker for Watch or Training Today?
Training Today is rated higher. HRV Tracker for Watch averages 4.5 out of 5 from 939 ratings, while Training Today averages 4.6 from 2.6K ratings.
Do HRV Tracker for Watch or Training Today have ads?
Neither HRV Tracker for Watch nor Training Today shows ads.
Which is updated more often, HRV Tracker for Watch or Training Today?
HRV Tracker for Watch ships an update monthly, and Training Today every 6 weeks. Most recently, HRV Tracker for Watch was updated on September 23, 2026 and Training Today on September 24, 2026.

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