# KIE OS vs Kieslect

The clearest difference is rating: Kieslect at 3.5 against KIE OS's 2.8. Kieslect also leads on update cadence (every 8 days vs every 3 weeks). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Kieslect holds the better App Store score, 3.5 against 2.8. Both are backed by a comparable volume of ratings — 26 and 11 respectively. Written reviews split almost evenly too, at 33% and 33% positive.

KIE OS ships an update every 3 weeks, Kieslect every 8 days. The most recent releases landed on June 1, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | KIE OS | Kieslect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.8 (26 ratings)](https://appshunter.io/ios/app/kie-os/id1625873739/reviews) | **[3.5 (11 ratings)](https://appshunter.io/ios/app/kieslect/id6448015921/reviews)** |
| Number of ratings | **26** | 11 |
| Positive reviews | 33.3% of reviews | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Monetization | Free | Free |
| Size | 198 MB | 352 MB |
| Requires iOS | 9.0 | 9.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [展传 彭](https://appshunter.io/developer/1680852477) | [上海凯斯领拓技术有限公司](https://appshunter.io/developer/1696907877) |

## What reviewers say

### KIE OS

[App page](https://appshunter.io/ios/app/kie-os/id1625873739)

This app syncs with a compatible smartwatch to display your heart rate and activity data. Set reminders, alarms, and customize watch faces. It also integrates with HealthKit for seamless data sharing.

**Highlights:** Syncs SMS and call data, Records and displays heart rate data, Tracks steps, stride, and distance, Set reminders and alarms, HealthKit integration, Customizable watch faces

**Features:** macOS Compatibility

**In-app purchases:** none


### Kieslect

[App page](https://appshunter.io/ios/app/kieslect/id6448015921)

This app supports smartwatches by syncing SMS, call information, and health data like heart rate and steps. It helps users set reminders, alarms, and track fitness goals with detailed data visualization. Users can also customize watch faces and share their progress.

**Highlights:** Syncs SMS and call notifications, Records heart rate and sports data, Visualizes data with graphs, Sets reminders and alarms, Tracks exercise and sleep goals, Customizable watch faces, HealthKit integration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is KIE OS free?

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

### Is Kieslect free?

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

### Which has better reviews, KIE OS or Kieslect?

Kieslect is rated higher. KIE OS averages 2.8 out of 5 from 26 ratings, while Kieslect averages 3.5 from 11 ratings.

### Do KIE OS or Kieslect have ads?

Neither KIE OS nor Kieslect shows ads.

### Which is updated more often, KIE OS or Kieslect?

KIE OS ships an update every 3 weeks, and Kieslect every 8 days. Most recently, KIE OS was updated on June 1, 2026 and Kieslect on September 12, 2026.

---

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