# MTK Fitting vs Wellion SiDiary

The clearest difference is update cadence: MTK Fitting at every 3 weeks against Wellion SiDiary's every 27 months. MTK Fitting also leads on iOS requirement (9.0 vs 12.1). 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.

MTK Fitting ships an update every 3 weeks, Wellion SiDiary every 27 months. The most recent releases landed on October 5, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | MTK Fitting | Wellion SiDiary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/wellion-sidiary/id1621535711/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 27 months |
| Monetization | — | Free |
| Size | 58 MB | 23 MB |
| Requires iOS | **9.0** | 12.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Qian Zhang](https://appshunter.io/developer/1398260100) | [Sinovo Ltd. & Co. KG](https://appshunter.io/developer/387195226) |

## What reviewers say

### MTK Fitting

[App page](https://appshunter.io/ios/app/mtk-fitting/id1471759071)

**In-app purchases:** none


### Wellion SiDiary

[App page](https://appshunter.io/ios/app/wellion-sidiary/id1621535711)

Easily log diabetes-related data like blood glucose, blood pressure, and medications on your iPhone. Syncs with compatible devices and the PC version for comprehensive therapy analysis with your healthcare professional.

**Highlights:** Diabetes logbook (glucose, BP, meds), Bluetooth data transfer from compatible devices, Synchronization with PC version and online, Extensive statistics and trend analysis, Customizable data entry and display, Multiple unit and format options

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is MTK Fitting free?

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

### Is Wellion SiDiary free?

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

### Do MTK Fitting or Wellion SiDiary have ads?

Neither MTK Fitting nor Wellion SiDiary shows ads.

### Which is updated more often, MTK Fitting or Wellion SiDiary?

MTK Fitting ships an update every 3 weeks, and Wellion SiDiary every 27 months. Most recently, MTK Fitting was updated on October 5, 2026 and Wellion SiDiary on October 4, 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.*