Comparison

Cardiio vs HeartScan

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

Head to head
About

Cardiio

Easily track your heart rate, blood oxygen, and fitness using your phone's camera. Get instant readings, analyze trends, and access quick workouts to improve your cardiovascular health. Unlock advanced features for deeper insights and personalized health comparisons.

Highlights
  • Instant heart rate monitoring
  • Blood oxygen and fitness tracking
  • Quick 7-minute workouts
  • Progress trend analysis
  • Syncs with Apple Health
  • Data export for doctors
Features
Read full description

Track Your Heart Health for Free, Anytime, Anywhere with Cardiio. Join over 9.84 million users who trust Cardiio for accurate, easy heart health monitoring. Transform your iPhone into a powerful health tool — track your heart rate, boost fitness, and gain valuable insights, all with just your phone. Key Features: 1. Instant Heart Rate Monitoring—Accurate and Effortless • Place your finger on the camera for a precise reading in seconds. • Featured on CBS’s The Doctors and ABC News. 2. All-in-One Health Tracking Made Simple • Measure heart rate, blood oxygen, and fitness effortlessly. • Compare your progress with others in your age, gender, and region for motivation. 3. Quick Workouts to Strengthen Your Heart • Short, high-intensity 7-minute workouts that boost overall health. 4. Stay in Control—Monitor Progress and Build Healthy Habits • Unlimited heart rate tracking to stay on top of your health. • Analyze daily, weekly, and monthly trends—sync seamlessly with Apple Health. • Export your data easily for personal records or to share with a doctor. Ready for Deeper Insights? Unlock Cardiio PRO for the next level: • In-depth pulse waveform analysis • Blood pressure estimates and detailed oxygen tracking • Tailored calorie burn estimator for your activities • Personalized health comparisons by age and sex • Hypothetical life expectancy based on your heart trends Why Choose Cardiio? Cardiio combines simplicity with advanced tracking—perfect for anyone seeking accurate, no-fuss health monitoring. Enjoy a complete set of free features, with the option to unlock more when you’re ready for a deeper dive. What the Press is Saying: PC Magazine: "Simple, beautiful, and pretty slick." Cult of Mac: "Cardiio is one of those apps that wows you..." Lifehacker: "It’s a little mind-blowing..." How to Get the Most Out of Cardiio: Track Daily: Start each day by checking your heart rate to set a baseline. Follow Your Progress: Use the dashboard to track trends and adjust your goals. Upgrade for More: Enjoy powerful free features or upgrade when you want even deeper insights. Download Cardiio now and take charge of your heart health! Disclaimer: NOT FOR MEDICAL USE: Cardiio is intended for informational purposes only. If you have concerns about your heart health, consult a healthcare professional. Additional Information: Terms of service: https://www.cardiio.app/terms-of-use Privacy policy: https://www.cardiio.app/privacy-policy

About

HeartScan

This app uses your phone's sensors to visualize your heart's mechanical activity, offering insights into pulse, rhythm, and recovery. It provides detailed cardio-wave views and generates doctor-ready reports, all while keeping your data private on your device.

Highlights
  • Instant pulse and rhythm check
  • Cardio-wave viewer
  • Heart rate variability (HRV) snapshot
  • Session history tracking
  • Doctor-ready PDF export
  • AI-powered seismocardiography
Read full description

Meet HeartScan — the first phone‑only heart‑rate monitor that shows what your smartwatch can’t. Lay back, place the iPhone on your chest, hold still for 60 s. HeartScan turns micro‑vibrations into a real‑time cardio‑wave so you can see every beat, not just count it. Why people use HeartScan • Instant pulse & rhythm check — reassurance for skipped beats, palpitations, post‑COVID tachy.* • Training insight — athletes visualise stroke‑volume trends between VO₂ sessions. • Recovery tracking — post‑MI patients watch mechanical strength rebuild day by day. • Doctor‑ready PDF — export a clean report that cardiologists understand. Key features ▸ Accurate heart‑rate (BPM) powered by AI + seismocardiography (SCG) ▸ Cardio‑wave viewer — see each systole & diastole in motion ▸ HrV snapshot — variability graph for stress insight ▸ Session history — compare today vs last month ▸ PDF & CSV export — share or archive your data ▸ Works on any iPhone 8+ — no camera flash, no extra hardware How it works Lie flat on a sofa or bed. Open HeartScan and hit Start. Place the phone mid‑sternum or apical region. Breathe normally for one minute. Review BPM, wave, rhythm and HRV. Behind the scenes, our neural model filters out breathing, muscle artefacts and noise to estimate mechanical systole — something optical PPG and single‑lead ECG can’t do. Privacy first All recordings stay on your device unless you tap ‘Export’. No third‑party analytics. Read the full policy: heartscan.app/privacy Wellness disclaimer HeartScan is not a medical device. It does not detect arrhythmia, diagnose disease or replace professional advice. Always consult a physician if you have health concerns. Palpitation Panic Loop insight: 76 % of Reddit users said “seeing the wave calm down” reduces anxiety — that’s exactly what HeartScan delivers. Get started free Download now and join 100 000+ people who can finally see their heartbeat. Disclaimer: The app is not intended for medical use. This app is not medical software. This app is not a medical device. The app is designed to be used by adults. The app should not be used by a person with a pacemaker. The app does not provide medical or related advice. The information, including but not limited to, text, graphics, images, and other, material contained on the app is for informational purposes only. No material on this app is intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician, cardiologist, or another qualified healthcare provider with any questions you may have regarding a medical condition or treatment, and never disregard professional medical advice or delay in seeking it because of something you have read on the app. Do not use the app as a substitute for treatment or professional advice.

Screenshots

Cardiio4 screens
HeartScan4 screens

Verdict

The call

The clearest difference is review sentiment: Cardiio at 83% against HeartScan's 32%. Cardiio also leads on rating (4.7 vs 3.6) and ads (none vs shown). HeartScan's advantage is update cadence (every 3 weeks vs every 2 months) and iOS requirement (13.0 vs 16.6). On price, in-app purchases, monetization model and device support 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. Cardiio sells 11 in-app purchases, starting at $6.99 per 7 days and HeartScan sells 3 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Cardiio holds the better App Store score, 4.7 against 3.6. That said, the two scores are not equally well evidenced: Cardiio has 58K ratings behind it against 50, so its average is the more settled of the two. Written reviews point the same way: 83% of Cardiio's written reviews are positive against 32% of HeartScan's.

UpkeepUpdate frequency

Cardiio ships an update every 2 months, HeartScan every 3 weeks. The most recent releases landed on September 24, 2026 and September 21, 2026 respectively.

Scorecard6 real differences · 4 level
Cardiio versus HeartScan: the parameters behind the verdict, then further details
ParameterCardiioHeartScan
PriceFreeFree
Rating4.7 (58K ratings) — better3.6 (50 ratings)
Positive reviews83.4% of reviews — better31.6% of reviews
Number of ratings58K — better50
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.613.0 — better
Further details — not scored
Size101 MB85 MB
Age rating12+4+
DeveloperCardiio, Inc.BLATT sp. z o.o.

Customer experience

Cardiio

All ratings58,416 ratings
Positive94.7%
Neutral3.8%
Negative1.5%
Written reviews2,019 reviews
Positive83.4%
Neutral4.8%
Negative11.8%

HeartScan

All ratings48 ratings
Positive58.3%
Neutral12.5%
Negative29.2%
Written reviews19 reviews
Positive31.6%
Neutral15.8%
Negative52.6%

Bugs and requests

Cardiio

Reported bugs

3 issues
  • App crashes or freezes
  • Inaccurate or missing heart rate data
  • Inability to save or export readings

Requested features

4 requests
  • Customizable workout options
  • Support for irregular heart rhythms
  • Better historical data tracking
  • Gender-neutral setup options

HeartScan

Not enough reviews yet to summarise bugs or requests.

In-app purchases

11 purchases

Cardiio

Subscriptions2
  • Weekly Pro Upgrade3 Days trial$6.997 Days
  • Annual Pro Upgrade$39.991 Year
One-time9
  • Coach Max$1.99
  • Specific Heart Rate Pack$4.99
  • Hypothetical Life Expectancy Pack$4.99
Show 6 more
  • Target Heart Rate Pack$4.99
  • Calorie-Burn Estimator$4.99
  • Remove Promo Banner$4.99
  • Blood Oxygen Tracking$6.99
  • Pulse Waveform Pack$7.99
  • Full Pro Upgrade!$9.99
3 purchases

HeartScan

Subscriptions3
  • HeartScan Pro$19.991 Month
  • HeartScan Pro3 Days trial$19.991 Month
  • HeartScan Pro: 6-Months$79.996 Months

Questions

Is Cardiio free?
Cardiio is free to download, with in-app purchases available.
Is HeartScan free?
HeartScan is free to download, with in-app purchases available.
Which has better reviews, Cardiio or HeartScan?
Cardiio is rated higher. Cardiio averages 4.7 out of 5 from 58K ratings, while HeartScan averages 3.6 from 50 ratings.
Do Cardiio or HeartScan have ads?
HeartScan shows ads; Cardiio does not.
Which is updated more often, Cardiio or HeartScan?
Cardiio ships an update every 2 months, and HeartScan every 3 weeks. Most recently, Cardiio was updated on September 24, 2026 and HeartScan on September 21, 2026.

Other comparisons