# NexRing vs SiBio CKM

NexRing and SiBio CKM both sit at 2.3 stars, but that hides the real split: 33% of NexRing's written reviews are positive against 11% of SiBio CKM's. SiBio CKM's advantage is iOS requirement (12.0 vs 15.0). On price, rating, ratings volume and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 2.3 for NexRing against 2.3 for SiBio CKM. Both are backed by a comparable volume of ratings — 3 and 6 respectively. Written reviews are what separate them: 33% of NexRing's written reviews are positive against 11% of SiBio CKM's.

NexRing ships an update monthly, SiBio CKM every 2 months. The most recent releases landed on October 20, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | NexRing | SiBio CKM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (3 ratings)](https://appshunter.io/ios/app/nexring/id1635336932/reviews) | [2.3 (6 ratings)](https://appshunter.io/ios/app/sibio-ckm/id1662078861/reviews) |
| Number of ratings | 3 | **6** |
| Positive reviews | **33.3% of reviews** | 11.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free | Free |
| Size | 98 MB | 60 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Xiamen Linktop Technology Co.,LTD](https://appshunter.io/developer/1613093485) | [SiBio Technology Limited](https://appshunter.io/developer/1652596602) |

## What reviewers say

### NexRing

[App page](https://appshunter.io/ios/app/nexring/id1635336932)

Track sleep stages, readiness, and daily habits to understand your body's balance. Get personalized insights and monitor long-term trends to optimize your health and recovery.

**Highlights:** Sleep stage monitoring (REM, deep, light), Daily Sleep and Readiness scores, Actionable health guidance, Long-term trend analysis, Customizable habit tracking with tags

**Features:** macOS Compatibility

**In-app purchases:** none


### SiBio CKM

[App page](https://appshunter.io/ios/app/sibio-ckm/id1662078861)

This app allows users to monitor their real-time blood ketone data through Bluetooth transmission. It provides 14 days of historical data for tracking. Please note, it is for data collection only and not for diagnosis.

**Highlights:** Real-time blood ketone monitoring, 14-day data history, Bluetooth data transmission, Data display and tracking

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NexRing free?

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

### Is SiBio CKM free?

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

### Which has better reviews, NexRing or SiBio CKM?

NexRing and SiBio CKM are both rated 2.3 out of 5 on the App Store, from 3 and 6 ratings respectively.

### Do NexRing or SiBio CKM have ads?

Neither NexRing nor SiBio CKM shows ads.

### Which is updated more often, NexRing or SiBio CKM?

NexRing ships an update monthly, and SiBio CKM every 2 months. Most recently, NexRing was updated on October 20, 2026 and SiBio CKM on October 22, 2026.

---

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