Kardia vs CareLink SmartSync™ US
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kardia
Record medical-grade EKGs from home using a personal EKG device. Get instant analysis for common arrhythmias and easily share your heart data with your doctor for remote management of your heart health.
- Record medical-grade EKGs
- Instant arrhythmia analysis
- Share heart data with doctors
- Track heart health history
- Integrates with Apple Health
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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
CareLink SmartSync™ US
This application allows clinicians to remotely program and manage implantable medical devices. It provides access to device settings, pacing system analysis, and data reporting tools for use in clinical settings.
- Bluetooth connectivity
- Tablet connectivity tools
- Data export
- App software updates
- Pacing system analysis
- Implantable device programming
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The portable Medtronic CareLink SmartSync™ Device Manager allows clinicians to make programming changes to implantable devices in the operating suite or follow up clinic. The CareLink SmartSync™ Device Manager includes the CareLink SmartSync™ device manager app, CareLink SmartSync™ PSA app (pacing system analyzer), patient connector, base, and an Apple iPad®.* The device manager app is the primary interface of the device manager. The device manager app provides access to the implantable device apps and to the CareLink SmartSync PSA (Pacing System Analyzer) Application. This application includes the following features: • Bluetooth®* connectivity to communicate with the base and patient connector1 • Tablet connectivity tools for sharing and printing reports • Ability to export data • Ability to update the device manager app software using an Internet connection • Access to the CareLink SmartSync PSA (Pacing System Analyzer) application (referred to as the analyzer) to assess the pacing and sensing performance of the cardiac lead system during the implant of an implantable cardiac device • Access to implantable device apps, which communicate with implantable devices and allow the user to program the implantable device settings and view stored implanted device data The device manager is intended for use by healthcare professionals or Medtronic representatives in a clinical or hospital environment. * For tablet specifications, please consult www.medtronic.com/manuals. † For device compatibility, please consult www.medtronic.com/manuals.
Screenshots
Verdict
The clearest difference is rating: Kardia at 4.8 against CareLink SmartSync™ US's 3.8. Kardia also leads on ratings volume (238K vs 16) and update cadence (monthly vs every 4 months). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Kardia holds the better App Store score, 4.8 against 3.8. That said, the two scores are not equally well evidenced: Kardia has 238K ratings behind it against 16, so its average is the more settled of the two. Written reviews point the same way: 65% of Kardia's written reviews are positive against 50% of CareLink SmartSync™ US's.
Kardia ships an update monthly, CareLink SmartSync™ US every 4 months. The most recent releases landed on November 4, 2026 and November 2, 2026 respectively.
| Parameter | Kardia | CareLink SmartSync™ US |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (238K ratings) — better | 3.8 (16 ratings) |
| Positive reviews | 64.7% of reviews — better | 50.0% of reviews |
| Number of ratings | 238K — better | 16 |
| Update frequency | Monthly — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | #89 — better | — |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 455 MB | 304 MB |
| Age rating | 17+ | 17+ |
| Developer | AliveCor, Inc. | Medtronic, Inc. |
Customer experience
Kardia
CareLink SmartSync™ US
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
CareLink SmartSync™ US
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Kardia
No in-app purchases
CareLink SmartSync™ US
No in-app purchases
Questions
Is Kardia free?
Is CareLink SmartSync™ US free?
Which has better reviews, Kardia or CareLink SmartSync™ US?
Do Kardia or CareLink SmartSync™ US have ads?
Which is updated more often, Kardia or CareLink SmartSync™ US?
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