Kardia vs RedMed
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kardia
This app allows you to record medical-grade EKGs using compatible personal devices. It provides immediate analysis for common arrhythmias and enables sharing of heart data with your doctor for remote monitoring and health history tracking.
- Record medical-grade EKGs
- Immediate EKG analysis
- Share heart data with doctors
- Track heart health history
- Integrates with Apple Health
- Remote heart condition monitoring
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Kardia works with the FDA-cleared KardiaMobile, KardiaMobile 6L, or KardiaBand personal EKG devices, which can detect the most common arrhythmias in just 30 seconds. The Kardia app is designed to make managing heart care from home easier than ever, giving you the ability to seamlessly record EKGs, share heart data with your doctor remotely, keep track of your health history, and more. Capture a medical-grade EKG with your Kardia device anytime, anywhere—no patches, wires, or gels required. Get an immediate result from Kardia's Instant Analysis of normal, possible atrial fibrillation, bradycardia, or tachycardia. For additional analysis, you can choose to send the recording to your physician or to one of our partners for a Clinician Review by a cardiologist (US, Australia only) or cardiac care physiologist (UK, Ireland only). The Kardia system is recommended by leading cardiologists and used by people around the world for accurate EKG recordings. Track your heart health data from home with the medical accuracy your doctor can trust. NOTE: This app requires KardiaMobile, KardiaMobile 6L, or KardiaBand hardware to record an EKG. Get your Kardia device now at alivecor.com. Kardia integrates with Apple Health to create a combined view of your health metrics. NOTE: Requires KardiaMobile or KardiaBand hardware to record an EKG FDA 510(k) numbers: K191406, K181823, K171816, K183319 CE # 0123
RedMed
This app generates red light on your device's screen with adjustable duration and pulse frequency to potentially aid cellular repair. It can also disable device radios and mute audio for an uninterrupted experience.
- Adjustable red light duration
- Variable pulse frequency (0-30 Hz, up to 120 Hz on iPad Pro)
- Maximum screen brightness
- Airplane mode activation
- Audio muting
- Aids cellular repair
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RedMed allows you to generate red light on your device's screen for a specific duration at a preferred pulse (from 0 to 30 Hz or up to 120 Hz on the iPad Pro) at the maximum brightness of your display. Red light has been shown to have a therapeutic effect, some studies show a heightened effect when the light is pulsed rather than static. 10 Hz is a good starting point for pulsing. The software aids you to turn off all the devices radio hardware (enable airplane mode) as well as mute the audio to enhance the therapeutic effect without any disturbance of calls or EMR (electromagnetic radiation). When cells are exposed to red light the production of ATP (adenosine triphosphate) increases along with ROS (reactive oxygen species) and NO (nitric oxide). All of these factors aid cellular repair. Important Note: Pulsing light is not suitable for photosensitive epileptics. DISCLAIMER: NOT FOR MEDICAL USE RedMed is not intended to prevent or treat any condition, or to be a substitute for professional medical care. RedMed has not been cleared or approved by the U.S. Food and Drug Administration.
Screenshots
Verdict
The clearest difference is price: Kardia at Free against RedMed's $0.99. Kardia also leads on rating (4.8 vs 3.2) and ratings volume (238K vs 5). RedMed's advantage is iOS requirement (10.0 vs 15.0). On review sentiment, ads, in-app purchases 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
Kardia is free to download; RedMed costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Kardia holds the better App Store score, 4.8 against 3.2. That said, the two scores are not equally well evidenced: Kardia has 238K ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 65% of Kardia's written reviews are positive against 67% of RedMed's, so the app with the better star average is not the one people write more warmly about.
| Parameter | Kardia | RedMed |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.8 (238K ratings) — better | 3.2 (5 ratings) |
| Positive reviews | 65.1% of reviews | 66.7% of reviews — better |
| Number of ratings | 238K — better | 5 |
| Update frequency | Monthly | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Best chart rank | #86 — better | — |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 457 MB | 15 MB |
| Age rating | 17+ | 12+ |
| Developer | AliveCor, Inc. | Vedic Society |
Customer experience
Kardia
RedMed
Bugs and requests
Kardia
Reported bugs
3 issues- App crashes or freezes
- Compatibility issues with newer devices
- Difficulty sending or saving ECG recordings
Requested features
4 requests- Integrate with Apple Health
- Add temperature tracking
- Improve data sharing and reporting
- Enhance user interface and experience
RedMed
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Kardia
No in-app purchases
RedMed
No in-app purchases





