Comparison

Heart Analyzer vs Just VO2 Max

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

Head to head
About

Heart Analyzer

Gain deep insights into your heart health using data from your Apple Watch. Visualize trends, analyze metrics like Cardio Recovery and Heart Rate Zones, and generate detailed PDF reports. Offers advanced features and privacy-focused data handling.

Highlights
  • Dashboard with daily summaries
  • Visualized heart rate and health data charts
  • Health vital trend assessment
  • Cardio Recovery and Heart Rate Zone analysis
  • Exportable PDF heart reports
  • ECG data comparison
  • HRV rMSSD and heart rate calibration
Features
Read full description

Heart Analyzer helps you track Heart Rate, HRV, Resting Heart Rate, Cardio Recovery, Sleep and ECG trends using Apple Watch. Analyze your Health data with advanced charts, insights, Heart Reports, widgets and detailed heart analytics powered by Apple Health. Set your own high and low heart rate alerts, take control of your HRV data in the new HRV Center, and see your sleep in detail with multiple sessions, naps and time out of bed. ------------------------------------------------ ■ Simple PRIVACY ------------------------------------------------ ◎ No third party analytics ◎ No data ever leaves your device ◎ No modifications to your health data ------------------------------------------------ ■ FEATURES ------------------------------------------------ ◎ The Dashboard - Where you can swipe between days, scroll through summaries and tap into the details ◎ Charts - Heart Rate and other Health data visualized through metrics and trends of any given day ◎ Insights - Effortlessly assess your Health Vital trends ◎ Heart Rate Alerts - Choose your own high and low heart rate limits, set mute times, and opt to be notified only on sustained changes ◎ HRV Center - Control the quality and context of the Heart Rate Variability data behind your trends ◎ Sleep - Multiple sleep sessions, naps and time out of bed, with your heart rate through the night ◎ Analytics Plus - Gain a unique understanding of important metrics such as Cardio Recovery, Heart Rate Zones and plenty more ◎ Heart Reports - Generate and export tailored PDFs including a large selection of metrics with custom timescales and password protection support ◎ Bookmarks - Highlight specific days of interest, make notes on relevant details ◎ Widgets - Interact with your Home Screen and track your Heart Rate, Resting Heart Rate trends and more at a glance ◎ ECGs - Compare and analyze data recorded by Apple Watch ◎ Advanced features - Including HRV rMSSD, Heart Rate Calibration, Custom Heart Rate Zones, Smart Heart Rate Recovery and more ------------------------------------------------ ■ APPLE WATCH ------------------------------------------------ ◎ A re-designed app showing your Heart Rate over the day ◎ Heart Rate Alerts on your wrist, with no complication needed on your watch face ◎ Charts with you on the go for Move, Exercise, Cardio Points, HRV, Blood Oxygen Saturation and Resting Heart Rate ◎ Workouts right on your wrist, tap into the detail as soon as you finish your exercise ◎ Customizable complications to keep you up to date with your Heart Rate and also support for Blood Oxygen Saturation, Heart Rate Variability and Resting Heart Rate trends HEALTH SUPPORT INCLUDES: - Heart Rate - Resting Heart Rate - Blood Pressure (Systolic & Diastolic) - Electrocardiogram (ECG/EKG) - Blood Oxygen Saturation (SPO2) - Cardio Fitness (VO2Max) - Heart Rate Variability (SDNN & rMSSD) - Respiratory Rate - Breathing Disturbances - Workouts - Sleep Times, Sessions & Naps - Heart Rate Recovery - Apple Fitness & Activity - High & Low Heart Rate Notifications Heart Analyzer Premium is available as an optional monthly or annual subscription. You can also choose a one-time Lifetime Access purchase. Payment will be charged to your Apple ID account. Subscriptions automatically renew unless cancelled at least 24 hours before the end of the current billing period. You can manage or cancel your subscription at any time in your App Store account settings. Additional Terms of Use: https://www.helixapps.co.uk/heart-analyzer-terms-of-use Please Note: - Heart Analyzer integrates with the Apple Health App to read your Heart Rate and other Health data - Heart Analyzer is available on iPad with iCloud sync for Apple Health data enabled. However, you still need an iPhone with a paired Apple Watch to generate Health data to display in Heart Analyzer - To get the most out of Heart Analyzer, an iPhone with a paired Apple Watch is required

About

Just VO2 Max

Displays your most recent VO2 Max reading from Apple Health directly on your Apple Watch face. It refreshes automatically when new data is available after your workout, keeping your health information private and on your device.

Highlights
  • VO2 Max display
  • Apple Health integration
  • Automatic refresh
  • On-device data storage
  • Read-only data access
Features
Read full description

Your VO₂ max, wherever you look first. Just VO2 Max brings your latest Apple Health estimate to three equally important places: your Apple Watch face, iPhone Home Screen, and iPhone Lock Screen. Check your value without opening an app. ON YOUR WATCH FACE Choose a circular, rectangular, or corner complication. The rectangular style also shows your trend and measurement date and time. ON YOUR HOME SCREEN Choose a small, medium, or large widget. Each shows your value, trend, and measurement date and time. The large widget adds a chart of up to six recent readings. ON YOUR LOCK SCREEN Choose a circular gauge or rectangular widget. The rectangular style shows your value, measurement date and time, and trend when available. COMPANION APPS Use the iPhone and Apple Watch apps to grant read-only Health access, refresh the shared reading, and check setup. The iPhone app also shows up to six recent readings. SIMPLE AND PRIVATE • Free, with no account or subscription • Read-only access to VO₂ max in Apple Health • Health readings stay on your devices • No ads in widgets, complications, or the Watch app • The iPhone companion app is supported by banner ads Just VO2 Max displays estimates already stored in Apple Health. It does not measure or calculate VO₂ max. New readings depend on Apple Health and supported workouts; iOS and watchOS manage refresh timing. The trend compares your latest estimate with up to three previous readings. Your VO₂ max values, sample dates, and sources are never sent to advertising or analytics providers. The app displays fitness information only and does not provide medical advice.

Screenshots

Heart Analyzer4 screens
Just VO2 Max4 screens

Verdict

The call

The clearest difference is in-app purchases: Just VO2 Max at none against Heart Analyzer's 7. Just VO2 Max also leads on rating (5.0 vs 4.7). Heart Analyzer's advantage is ads (none vs shown) and ratings volume (22K vs 3). On price, update cadence, device support and iOS requirement 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 Analyzer sells 7 in-app purchases, starting at $3.99 per month. Just VO2 Max asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Just VO2 Max holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Heart Analyzer has 22K ratings behind it against 3, so its average is the more settled of the two.

UpkeepUpdate frequency

Heart Analyzer ships an update weekly, Just VO2 Max every 5 days. The most recent releases landed on October 21, 2026 and October 13, 2026 respectively.

Scorecard5 real differences · 5 level
Heart Analyzer versus Just VO2 Max: the parameters behind the verdict, then further details
ParameterHeart AnalyzerJust VO2 Max
PriceFreeFree
Rating4.7 (22K ratings)5.0 (3 ratings) — better
Positive reviews84.2% of reviews—
Number of ratings22K — better3
Update frequencyWeeklyEvery 5 days — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, Apple Watch — betteriPhone, Apple Watch
Requires iOS17.517.0 — better
Further details — not scored
Size54 MB11 MB
Age rating4+4+
DeveloperHelix Apps LTDCuprea s.r.o.

Customer experience

Heart Analyzer

All ratings22,267 ratings
Positive92.6%
Neutral3.6%
Negative3.7%
Written reviews1,850 reviews
Positive84.2%
Neutral6.3%
Negative9.5%

Just VO2 Max

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Heart Analyzer

Reported bugs

3 issues
  • Premium features not working as expected
  • Syncing issues between iPhone and Apple Watch
  • Oxygen level tracking not functioning properly

Requested features

4 requests
  • Add blood pressure monitoring
  • Allow generating reports for current month
  • Improve ECG interpretation guidance
  • Add option to customize Apple Watch complications

Just VO2 Max

Not enough reviews yet to summarise bugs or requests.

In-app purchases

7 purchases

Heart Analyzer

Subscriptions2
  • Monthly$3.991 Month
  • Annual$19.991 Year
One-time5
  • Data Plus$9.99
  • Reports Plus$9.99
  • Analytics Plus$9.99
Show 2 more
  • Complete Premium$24.99
  • Lifetime Access$49.99
None

Just VO2 Max

No in-app purchases

Questions

Is Heart Analyzer free?
Heart Analyzer is free to download, with in-app purchases available.
Is Just VO2 Max free?
Just VO2 Max is free to download, with no in-app purchases.
Which has better reviews, Heart Analyzer or Just VO2 Max?
Just VO2 Max is rated higher. Heart Analyzer averages 4.7 out of 5 from 22K ratings, while Just VO2 Max averages 5.0 from 3 ratings.
Do Heart Analyzer or Just VO2 Max have ads?
Just VO2 Max shows ads; Heart Analyzer does not.
Which is updated more often, Heart Analyzer or Just VO2 Max?
Heart Analyzer ships an update weekly, and Just VO2 Max every 5 days. Most recently, Heart Analyzer was updated on October 21, 2026 and Just VO2 Max on October 13, 2026.

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