# Kardia vs CareLink SmartSync™ US

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.

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.

## The numbers

| Metric | Kardia | CareLink SmartSync™ US |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (238K ratings)](https://appshunter.io/ios/app/kardia/id579769143/reviews)** | [3.8 (16 ratings)](https://appshunter.io/ios/app/carelink-smartsync-us/id1230078364/reviews) |
| Number of ratings | **238K** | 16 |
| Positive reviews | **64.7% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | Free | Free |
| Best chart rank | **#101** | — |
| Size | 455 MB | 304 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPad |
| Age rating | 17+ | 17+ |
| Developer | [AliveCor, Inc.](https://appshunter.io/developer/546535893) | [Medtronic, Inc.](https://appshunter.io/developer/445860677) |

## What reviewers say

### Kardia

[App page](https://appshunter.io/ios/app/kardia/id579769143)

**Currently charting:** #101 Top Free · Medical (US App Store)

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.

**Highlights:** Record medical-grade EKGs, Instant arrhythmia analysis, Share heart data with doctors, Track heart health history, Integrates with Apple Health

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Useful for monitoring heart health
- 🚀 Accurate and reliable device
- 📊 Helpful for providing evidence to doctors
- 🤖 Convenient and easy to use
- 💡 Allows remote monitoring of heart conditions

**What reviewers complain about**

- 🔒 Requires subscription to unlock advanced features
- 🔋 Battery life issues
- 🔌 Connectivity problems
- 🤔 Inconsistent or inaccurate readings
- 💰 Expensive device and subscription

**Reported bugs**

- App crashes or freezes
- Compatibility issues with newer devices
- Difficulty sending or saving ECG recordings

**Requested features**

- Integrate with Apple Health
- Add temperature tracking
- Improve data sharing and reporting
- Enhance user interface and experience


### CareLink SmartSync™ US

[App page](https://appshunter.io/ios/app/carelink-smartsync-us/id1230078364)

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.

**Highlights:** Bluetooth connectivity, Tablet connectivity tools, Data export, App software updates, Pacing system analysis, Implantable device programming

**In-app purchases:** none


## Frequently asked questions

### Is Kardia free?

Kardia is free to download, with no in-app purchases.

### Is CareLink SmartSync™ US free?

CareLink SmartSync™ US is free to download, with no in-app purchases.

### Which has better reviews, Kardia or CareLink SmartSync™ US?

Kardia is rated higher. Kardia averages 4.8 out of 5 from 238K ratings, while CareLink SmartSync™ US averages 3.8 from 16 ratings.

### Do Kardia or CareLink SmartSync™ US have ads?

Neither Kardia nor CareLink SmartSync™ US shows ads.

### Which is updated more often, Kardia or CareLink SmartSync™ US?

Kardia ships an update monthly, and CareLink SmartSync™ US every 4 months. Most recently, Kardia was updated on November 4, 2026 and CareLink SmartSync™ US on November 2, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*