# EWATT vs Pro BMS

The clearest difference is iOS requirement: EWATT at 13.0 against Pro BMS's 15.6. 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.

Both ship on a similar rhythm, roughly every 2 months. Both last shipped on October 30, 2026.

## The numbers

| Metric | EWATT | Pro BMS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/pro-bms/id6474855560/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | — | Free |
| Size | 24 MB | 35 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [帆 刘](https://appshunter.io/developer/1706245535) | [Shenzhen Leagend Optoelectronics Co., Ltd.](https://appshunter.io/developer/6798210621) |

## What reviewers say

### EWATT

[App page](https://appshunter.io/ios/app/ewatt-bms/id6464585303)

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

**In-app purchases:** none


### Pro BMS

[App page](https://appshunter.io/ios/app/pro-bms/id6474855560)

This utility app measures and displays real-time battery parameters like voltage, current, and capacity. It offers customizable protection functions and allows for voltage/current curve export. Control and monitoring are available via a mobile app.

**Highlights:** Real-time voltage and current measurement, Power, charge, and discharge capacity monitoring, Customizable protection functions (overvoltage, overcurrent, etc.), Color LCD display of comprehensive data, Voltage and current curve display and export, Mobile app control and communication

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EWATT free?

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

### Is Pro BMS free?

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

### Do EWATT or Pro BMS have ads?

Neither EWATT nor Pro BMS shows ads.

### Which is updated more often, EWATT or Pro BMS?

EWATT ships an update every 2 months, and Pro BMS every 2 months. Most recently, EWATT was updated on October 30, 2026 and Pro BMS on October 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.*