# KD DFU vs VSG101 Update

The clearest difference is iOS requirement: KD DFU at 12.0 against VSG101 Update's 16.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

KD DFU ships an update every 2 months, VSG101 Update every 5 weeks. The most recent releases landed on September 26, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | KD DFU | VSG101 Update |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Size | 26 MB | 1 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Guangzhou Kuodao Internet of Things Technology Co., Ltd.](https://appshunter.io/developer/1196125665) | [VITALSIGNS TECHNOLOGY CO., LTD.](https://appshunter.io/developer/1394370436) |

## What reviewers say

### KD DFU

[App page](https://appshunter.io/ios/app/kd-dfu/id1571856283)

**Features:** macOS Compatibility

**In-app purchases:** none


### VSG101 Update

[App page](https://appshunter.io/ios/app/vsg101-update/id1628054504)

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

**In-app purchases:** none


## Frequently asked questions

### Is KD DFU free?

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

### Is VSG101 Update free?

VSG101 Update is free to download, with no in-app purchases.

### Do KD DFU or VSG101 Update have ads?

Neither KD DFU nor VSG101 Update shows ads.

### Which is updated more often, KD DFU or VSG101 Update?

KD DFU ships an update every 2 months, and VSG101 Update every 5 weeks. Most recently, KD DFU was updated on September 26, 2026 and VSG101 Update on October 1, 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.*