Comparison

Heart Analyzer vs Sleep Details

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 health 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

Sleep Details

Track your sleep data and receive a daily sleep score based on information from your Apple Watch. Gain insights into sleep stages, heart rate, and more, with personalized ratings and factor tagging. Features a memory test and daily summaries for enhanced understanding of your sleep's impact.

Highlights
  • Daily sleep score
  • Detailed sleep metrics
  • Personalized sleep rating
  • Sleep factor tagging
  • Morning notifications
  • Memory test
  • Daily sleep summaries
Features
Read full description

Track your sleep related data and see your daily sleep score based on data collected by your Apple Watch. Sleep Details requires an Apple Watch with watchOS 10 or later installed. Sleep Details integrates with the Health app and uses data stored in the Health app. Key features: -Daily sleep score based on sleep duration and other relevant sleep related data -See details of the following sleep related data: Sleep stages and times, Activity while sleeping, Heart rate, Heart rate variability, Respiratory Rate, Blood oxygen levels (SpO2 data is available only on Apple Watch series 6 or later devices), Wrist Temperature (only available on Apple Watch series 8 and Apple Watch Ultra devices ) -Privacy: We do not collect any data from your devices -Receive morning notifications with last nights sleep score and sleep duration -Rate your sleep. Your personal feeling based rating will also adjust your daily score -Tag your sleep with factors that possibly affected your sleep. For example if you feel that caffeine affected your sleep you can tap the caffeine icon to tag your sleep -Add naps: In the iPhone app you can add naps that Sleep Details has detected. You can also add naps manually. Your naps duration will contribute to your daily sleep duration and therefore affect your daily score and sleep dept calculations. -Night Mode: If you open Sleep Details during the night, you will see your most recent 4 hour Heart Rate, Heart Rate Variability and Blood Oxygen (Series 6 or later) averages. -Daily Sleep Summary: Devices that support Apple Intelligence can use the 'Generate summary' feature to generate a daily sleep summary with additional insights (iOS 26 required). -Sleep has an important role in the performance of your memory. To highlight this, we added a simple memory test in Sleep Details: 1) Before going to bed try memorize a set of icons and their location. 2) Then after waking up, try remember and fill in these items. 3) New icons and locations will be generated for each day, so you can track your long-term progress by completing a new test each day. -Add Sleep Details as a complication on your watch faces -On your Apple Watch you can tap different metrics to see more details -Two week sleep score trend available on your iPhone. You can tap different days to see the sleep details of the selected day -On your iPhone you can tap different metrics to get a description of the selected metric -History view with your all-time averages and min/max values for all available sleep related data -After your free seven day trial has ended you can continue to use the app by purchasing monthly subscription or the "Lifetime access" in-app purchase. Purchases can also be made before the trial ends by tapping the trial end date.  -"Lifetime access" and monthly subscription purchases will also unlock the Sleep Details toolbar and comparison charts Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula How are different health metrics used to calculate your last nights sleep score? As an example your score will be lower if your last nights heart rate average is higher than your weekly resting heart rate average. In this case the heart rate ring will be colored red so you can easily spot which metrics are negatively affecting your score. If you have any questions we will happily help you: contact@sydvesti.com

Screenshots

Heart Analyzer4 screens
Sleep Details4 screens

Verdict

The call

The clearest difference is review sentiment: Heart Analyzer at 84% against Sleep Details's 50%. Heart Analyzer also leads on update cadence (weekly vs every 2 months) and rating (4.7 vs 4.4). On price, ads, in-app purchases and monetization model 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 and Sleep Details sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Heart Analyzer holds the better App Store score, 4.7 against 4.4. That said, the two scores are not equally well evidenced: Heart Analyzer has 22K ratings behind it against 1.1K, so its average is the more settled of the two. Written reviews point the same way: 84% of Heart Analyzer's written reviews are positive against 50% of Sleep Details's.

UpkeepUpdate frequency

Heart Analyzer ships an update weekly, Sleep Details every 2 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 6 level
Heart Analyzer versus Sleep Details: the parameters behind the verdict, then further details
ParameterHeart AnalyzerSleep Details
PriceFreeFree
Rating4.7 (22K ratings) — better4.4 (1.1K ratings)
Positive reviews84.2% of reviews — better50.0% of reviews
Number of ratings22K — better1.1K
Update frequencyWeekly — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, Apple Watch — betteriPhone, Apple Watch
Requires iOS17.5 — better18
Further details — not scored
Size54 MB29 MB
Age rating4+4+
DeveloperHelix Apps LTDSydvesti Oy

Customer experience

Heart Analyzer

All ratings22,303 ratings
Positive92.6%
Neutral3.6%
Negative3.7%
Written reviews1,853 reviews
Positive84.2%
Neutral6.3%
Negative9.5%

Sleep Details

All ratings1,058 ratings
Positive84.0%
Neutral7.4%
Negative8.6%
Written reviews52 reviews
Positive50.0%
Neutral9.6%
Negative40.4%

User reviews

Heart Analyzer

From 22K App Store ratings

What we love

  • 🚀 Great app for health monitoring
  • 👍 Packed with useful information
  • 🚀 Excellent visualizations and charts
  • 👍 Easy to use and understand
  • 👍 Helpful for monitoring heart conditions

Room to improve

  • 🐛 Occasional crashes or bugs
  • 🔋 Drains Apple Watch battery
  • 🔍 Needs more explanation of metrics
  • 🔍 Visuals could be improved for easier reading
  • 🔍 Automatic updates to complications not reliable

Sleep Details

From 1.1K App Store ratings

What we love

  • 👍 Great interface
  • 👍 Helpful for understanding sleep
  • 👍 Good for blind users

Room to improve

  • 🐛 App not working/tracking properly
  • 🐛 Sleep time/data inaccurate
  • 🔒 Subscription/payment issues
  • 🔋 Drains battery

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

Sleep Details

Reported bugs

3 issues
  • Sleep stage section disappeared
  • App keeps kicking user out
  • Widget doesn't update with current data

Requested features

4 requests
  • Add ability to log naps
  • Improve widget updates
  • Provide more explanation of sleep metrics
  • Implement REM sleep tracking

In-app purchases

7 purchases

Heart Analyzer

Subscriptions2
  • Monthly$3.991 Month
  • Annual$24.991 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
3 purchases

Sleep Details

Subscriptions2
  • Monthly subscription$2.991 Month
  • Yearly subscription$29.991 Year
One-time1
  • Lifetime Access$59.99

Questions

Is Heart Analyzer free?
Heart Analyzer is free to download, with in-app purchases available.
Is Sleep Details free?
Sleep Details is free to download, with in-app purchases available.
Which has better reviews, Heart Analyzer or Sleep Details?
Heart Analyzer is rated higher. Heart Analyzer averages 4.7 out of 5 from 22K ratings, while Sleep Details averages 4.4 from 1.1K ratings.
Do Heart Analyzer or Sleep Details have ads?
Neither Heart Analyzer nor Sleep Details shows ads.
Which is updated more often, Heart Analyzer or Sleep Details?
Heart Analyzer ships an update weekly, and Sleep Details every 2 months. Most recently, Heart Analyzer was updated on October 29, 2026 and Sleep Details on October 24, 2026.

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