# RoyPow Fish. vs 小牛BMS

The clearest difference is update cadence: 小牛BMS at every 5 days against RoyPow Fish.'s every 5 weeks. 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.

RoyPow Fish. ships an update every 5 weeks, 小牛BMS every 5 days. The most recent releases landed on October 13, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | RoyPow Fish. | 小牛BMS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.5 (4 ratings)](https://appshunter.io/ios/app/roypow-fish/id6446618041/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 5 days** |
| Monetization | Free | — |
| Size | 27 MB | 38 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [深圳市环宇鼎鑫科技有限公司](https://appshunter.io/developer/1639662642) | [Nanchang Yepai Technology Co., Ltd.](https://appshunter.io/developer/1503296093) |

## What reviewers say

### RoyPow Fish.

[App page](https://appshunter.io/ios/app/roypow-fish/id6446618041)

Monitor your battery management system (BMS) directly from your mobile device. Connect via Bluetooth to view battery status and parameters in real-time.

**Highlights:** Bluetooth connection, Battery BMS monitoring, Real-time parameter viewing, Mobile phone compatibility

**Features:** macOS Compatibility

**In-app purchases:** none


### 小牛BMS

[App page](https://appshunter.io/ios/app/bms/id6781190295)

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

**In-app purchases:** none


## Frequently asked questions

### Is RoyPow Fish. free?

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

### Is 小牛BMS free?

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

### Do RoyPow Fish. or 小牛BMS have ads?

Neither RoyPow Fish. nor 小牛BMS shows ads.

### Which is updated more often, RoyPow Fish. or 小牛BMS?

RoyPow Fish. ships an update every 5 weeks, and 小牛BMS every 5 days. Most recently, RoyPow Fish. was updated on October 13, 2026 and 小牛BMS on October 11, 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.*