# Pro BMS vs LANGZEIT Batterien BMS

The clearest difference is update cadence: LANGZEIT Batterien BMS at every 3 days against Pro BMS's every 2 months. LANGZEIT Batterien BMS also leads on iOS requirement (13.0 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.

Pro BMS ships an update every 2 months, LANGZEIT Batterien BMS every 3 days. The most recent releases landed on October 13, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Pro BMS | LANGZEIT Batterien 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 3 days** |
| Monetization | Free | — |
| Size | 35 MB | 23 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Leagend Optoelectronics Co., Ltd.](https://appshunter.io/developer/6798210621) | [SIGA Batteries GmbH](https://appshunter.io/developer/1809092878) |

## What reviewers say

### 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


### LANGZEIT Batterien BMS

[App page](https://appshunter.io/ios/app/langzeit-batterien-bms/id6754519253)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Pro BMS free?

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

### Is LANGZEIT Batterien BMS free?

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

### Do Pro BMS or LANGZEIT Batterien BMS have ads?

Neither Pro BMS nor LANGZEIT Batterien BMS shows ads.

### Which is updated more often, Pro BMS or LANGZEIT Batterien BMS?

Pro BMS ships an update every 2 months, and LANGZEIT Batterien BMS every 3 days. Most recently, Pro BMS was updated on October 13, 2026 and LANGZEIT Batterien BMS on October 25, 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.*