# PhyOTA vs CS900

The clearest difference is update cadence: PhyOTA at every 6 weeks against CS900's every 9 months. CS900's advantage is iOS requirement (10.0 vs 15.6). 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.

PhyOTA ships an update every 6 weeks, CS900 every 9 months. The most recent releases landed on September 17, 2026 and August 10, 2026 respectively.

## The numbers

| Metric | PhyOTA | CS900 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/phyota/id1492851629/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 9 months |
| Monetization | Free | — |
| Size | 3 MB | 23 MB |
| Requires iOS | 15.6 | **10.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [奉加微电子](https://appshunter.io/developer/1472300997) | [Sunitec Enterprise Co., LTD](https://appshunter.io/developer/777497439) |

## What reviewers say

### PhyOTA

[App page](https://appshunter.io/ios/app/phyota/id1492851629)

This utility app facilitates over-the-air (OTA) upgrades for BLE chips. It supports various chip generations and features like Xip and encrypted OTA functionality, offering a simple integration demo.

**Highlights:** BLE chip OTA upgrades, Support for 1st gen 6202 chips, Support for 2nd gen 6212 chips, Long packet transmission, Xip support, Encrypted OTA functionality

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

**In-app purchases:** none


### CS900

[App page](https://appshunter.io/ios/app/cs900/id1504189445)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PhyOTA free?

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

### Is CS900 free?

CS900 is free to download, with no in-app purchases.

### Do PhyOTA or CS900 have ads?

Neither PhyOTA nor CS900 shows ads.

### Which is updated more often, PhyOTA or CS900?

PhyOTA ships an update every 6 weeks, and CS900 every 9 months. Most recently, PhyOTA was updated on September 17, 2026 and CS900 on August 10, 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.*