# SiBio CKM vs CycleJames

The clearest difference is update cadence: CycleJames at fortnightly against SiBio CKM's every 2 months. SiBio CKM's advantage is iOS requirement (12.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

SiBio CKM ships an update every 2 months, CycleJames fortnightly. The most recent releases landed on October 22, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | SiBio CKM | CycleJames |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.3 (6 ratings)](https://appshunter.io/ios/app/sibio-ckm/id1662078861/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 11.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 60 MB | 2 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SiBio Technology Limited](https://appshunter.io/developer/1652596602) | [James browne](https://appshunter.io/developer/1896125874) |

## What reviewers say

### 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


### CycleJames

[App page](https://appshunter.io/ios/app/cyclejames/id6765917117)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SiBio CKM free?

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

### Is CycleJames free?

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

### Do SiBio CKM or CycleJames have ads?

Neither SiBio CKM nor CycleJames shows ads.

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

SiBio CKM ships an update every 2 months, and CycleJames fortnightly. Most recently, SiBio CKM was updated on October 22, 2026 and CycleJames on October 31, 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.*