# PhyOTA vs ExternalBrain外脑

PhyOTA and ExternalBrain外脑 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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, ExternalBrain外脑 every 5 weeks. Both last shipped on September 17, 2026.

## The numbers

| Metric | PhyOTA | ExternalBrain外脑 |
| --- | --- | --- |
| 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 5 weeks** |
| Monetization | Free | — |
| Size | 3 MB | 193 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [奉加微电子](https://appshunter.io/developer/1472300997) | [Shenzhen External Brain Technology Co., Ltd.](https://appshunter.io/developer/1563408639) |

## 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


### ExternalBrain外脑

[App page](https://appshunter.io/ios/app/externalbrain/id6670423733)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PhyOTA free?

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

### Is ExternalBrain外脑 free?

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

### Do PhyOTA or ExternalBrain外脑 have ads?

Neither PhyOTA nor ExternalBrain外脑 shows ads.

### Which is updated more often, PhyOTA or ExternalBrain外脑?

PhyOTA ships an update every 6 weeks, and ExternalBrain外脑 every 5 weeks. Most recently, PhyOTA was updated on September 17, 2026 and ExternalBrain外脑 on September 17, 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.*