Comparison

Heart Graph vs Heartool

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

Head to head
About

Heart Graph

Track your heart rate in real-time and analyze trends over time. Understand your body's response to training and general health with detailed graphs and statistics. Import data from Apple Health for a comprehensive view of your fitness journey.

Highlights
  • Real-time heart rate graphing
  • Apple Health integration
  • Session comparison and statistics
  • Heart rate zone analysis
  • Planned workout design
  • Heart rate alarms
  • Background data recording
Features
Read full description

Knowing your current heart rate is useful, but seeing in real time how it varies over a longer period gives you much more information, especially when trying to understand how your body is responding to a training plan. Heart Graph can be used for all types of aerobic exercise including running, cycling, rowing or gym work, and of course you can also use it to study your normal heart rate for general health reasons. Heart Graph allows you to record new data and see your heart rate graph in real time, as well as importing existing data from Apple Health. Data from previous sessions can then be compared to give a deeper understanding of how your body is changing over time, for example by directly comparing the graphs for equivalent sessions, viewing statistics such as max, mean and resting heart rate across sessions, or seeing the proportion of time spent in different heart rate zones aggregated over weeks or months. (Note some features require a one-off In-App Purchase, as described below.) FREE features of Heart Graph include: * Display a real-time graph of heart rate against time on your iPhone or iPad * Support for both Bluetooth sensors and Apple Watch * No ads * Review your sessions offline to spot trends in your data * Integration with Apple Health: import existing workout data and store new workouts * Maximise the screen area for graphs on iPhone using landscape orientation * Group related sessions by adding your own notes, then searching for sessions matching those notes * Record a standard Reference Set at the start of each session to help determine how your body is really doing; if your heart rate is elevated, you may want to take it easy * Record data in the background if you want to use other heart rate apps (Bluetooth sensors) * Calculate calories burned, and set a calorie target for each session Beyond the basics, a single, one-off In-App Purchase will enable the Premium Features, giving you access to more in-depth analysis tools and the ability to design your training sessions in the app. These Planned Workouts split a session into small pieces, for example sets at the the gym, or intervals on a bike. When you’re exercising, Heart Graph will keep track of where you are in the session and what’s coming up next, alerting you when it’s time to stop or move on. The trigger for moving from one set to the next can be a simple time gap (“wait 30 seconds”), or be based on heart rate to allow a specific amount of recovery before continuing (“wait until heart rate is below 120bpm”). The outcome is a structured plan that adapts to how your body is responding each time you do that session. Premium Features include: * View and analyse the time spent in each of five configurable heart rate zones * Add annotations to the graph during recording to help identify key events * Heart rate alarms when your heart rate changes zone or goes above or below configurable thresholds * Import data from the Health app for custom time periods of up to 24 hours * Directly compare graphs for equivalent sessions * Compare statistics (such as max, mean and resting heart rate) across sessions * Record a session to explicitly measure resting heart rate while you relax * Audio rep counting so you never lose count - make a noise every time you complete a rep and the app keeps track of how many you’ve done * Import and export heart rate data from other apps or your computer using Garmin TCX format files * Import Garmin GPX format files * Export data to CSV files for further analysis in software such as Excel (email, Dropbox, etc) Heart Graph requires an external sensor to record heart rate, such as: * A bluetooth (BTLE) sensor such as the Wahoo Tickr / Polar H10 chest straps, or the Mio Alpha watch * An Apple Watch * An ANT+ sensor connected using the Wahoo Key DISCLAIMER: Heart Graph is not a medical device, and you must always seek a doctor’s advice before making any medical decisions.

About

Heartool

Transform your phone into a fitness tracker to monitor workouts with live heart rate data. Analyze training progress with professional charts and gain insights into your health and cardio condition. Integrates with wearable devices and Apple Health.

Highlights
  • Live heart rate tracking
  • HRV biofeedback
  • Cardio health analysis
  • Workout progress charts
  • Calorie burned tracking
  • Health data synchronization
Read full description

Turn your phone into a fitness tracker with Heartool, to record your workouts with heart rate data. It is a concise and most accurate way to measure your training progress, to reach your fitness goals. Working with wearable devices to train in real time. For heart rate sensor recommend: www.fitcare.com Heartool gives you: 1.Tracking your live heart rate at right intensity for maximum results. With professional chart records, users could see their exercise effects when and after their training. 2.HRV biofeedback. Based on the heart rate sensor R-R interval data, together with professional algorithm, Heartool could help you to know your health and training status. 3.Cardio health condition. Based on the waveform (ECG) data and through the professional algorithm, Heartool could help you to discover hidden heart health hazards in time. HealthKit 1. Heartool Will share the record (heart rate) to the Apple's health applications after each exercise 2. Because the privacy of your health data is very important, the user must agree to authorize Apple Health in "Set up -> Authorization" in the Heartool APP before sharing the heart rate data to your Apple Health app. 3. Heartool Connect to a healthy feature supports iPhone 6 and above devices, and the system version is iOS9.0 and above. Main features: 1.Personalized heart rate zone setting, sync to the training sensor. 2.Calories burned checking based on the workouts. 3.Storing data import. If sensors not connected to the App, data could sync to the App after training. 4.Daily health management with cardio status and stress reflect. 5.Health data record, review a summary of the result from your entire workout history.

Screenshots

Heart Graph4 screens
Heartool4 screens

Verdict

The call

The clearest difference is review sentiment: Heart Graph at 87% against Heartool's 21%. Heart Graph also leads on rating (4.5 vs 3.1) and update cadence (every 2 weeks vs every 4 months). Heartool's advantage is in-app purchases (none vs 2) and iOS requirement (12.0 vs 15.0). On price 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

Both are free to download. Heart Graph sells 2 one-off in-app purchases. Heartool asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Heart Graph holds the better App Store score, 4.5 against 3.1. That said, the two scores are not equally well evidenced: Heart Graph has 1.2K ratings behind it against 14, so its average is the more settled of the two. Written reviews point the same way: 87% of Heart Graph's written reviews are positive against 21% of Heartool's.

UpkeepUpdate frequency

Heart Graph ships an update every 2 weeks, Heartool every 4 months. The most recent releases landed on September 24, 2026 and September 18, 2026 respectively.

Scorecard8 real differences · 2 level
Heart Graph versus Heartool: the parameters behind the verdict, then further details
ParameterHeart GraphHeartool
PriceFreeFree
Rating4.5 (1.2K ratings) — better3.1 (14 ratings)
Positive reviews86.5% of reviews — better21.2% of reviews
Number of ratings1.2K — better14
Update frequencyEvery 2 weeks — betterEvery 4 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPod
Requires iOS15.012.0 — better
Further details — not scored
Size33 MB24 MB
Age rating4+12+
DeveloperSmoky Cat Software Ltd.Shenzhen Onecoder Technology Co., Ltd.

Customer experience

Heart Graph

All ratings1,199 ratings
Positive88.3%
Neutral2.8%
Negative8.9%
Written reviews563 reviews
Positive86.5%
Neutral3.7%
Negative9.8%

Heartool

All ratings14 ratings
Positive42.9%
Neutral14.3%
Negative42.9%
Written reviews52 reviews
Positive21.2%
Neutral9.6%
Negative69.2%

Bugs and requests

Heart Graph

Reported bugs

2 issues
  • Workouts not always syncing correctly
  • App crashes or freezes on some devices

Requested features

4 requests
  • Add minimum heart rate to metrics
  • Integrate with more fitness apps and devices
  • Improve customization options for workout labels
  • Display heart rate on the workout selection screen

Heartool

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Heart Graph

One-time2
  • Support Ad-Free Software$0.99
  • Premium Features$2.99
None

Heartool

No in-app purchases

Questions

Is Heart Graph free?
Heart Graph is free to download, with in-app purchases available.
Is Heartool free?
Heartool is free to download, with no in-app purchases.
Which has better reviews, Heart Graph or Heartool?
Heart Graph is rated higher. Heart Graph averages 4.5 out of 5 from 1.2K ratings, while Heartool averages 3.1 from 14 ratings.
Do Heart Graph or Heartool have ads?
Neither Heart Graph nor Heartool shows ads.
Which is updated more often, Heart Graph or Heartool?
Heart Graph ships an update every 2 weeks, and Heartool every 4 months. Most recently, Heart Graph was updated on September 24, 2026 and Heartool on September 18, 2026.

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