# KD DFU vs PTT

The clearest difference is update cadence: KD DFU at every 2 months against PTT's every 12 months. PTT's advantage is iOS requirement (9.0 vs 12.0). 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.

KD DFU ships an update every 2 months, PTT every 12 months. The most recent releases landed on September 26, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | KD DFU | PTT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 12 months |
| Size | 26 MB | 28 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Guangzhou Kuodao Internet of Things Technology Co., Ltd.](https://appshunter.io/developer/1196125665) | [Shenzhen Corget Technology Co.,Ltd](https://appshunter.io/developer/1146811186) |

## What reviewers say

### KD DFU

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

**Features:** macOS Compatibility

**In-app purchases:** none


### PTT

[App page](https://appshunter.io/ios/app/ptt-agent/id1591523748)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is KD DFU free?

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

### Is PTT free?

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

### Do KD DFU or PTT have ads?

Neither KD DFU nor PTT shows ads.

### Which is updated more often, KD DFU or PTT?

KD DFU ships an update every 2 months, and PTT every 12 months. Most recently, KD DFU was updated on September 26, 2026 and PTT on September 30, 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.*