# Xiaoxiang BMS vs BERTRAM

The clearest difference is in-app purchases: BERTRAM at none against Xiaoxiang BMS's 1. BERTRAM also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Xiaoxiang BMS sells 1 one-off in-app purchase. BERTRAM asks for nothing beyond the download.

Xiaoxiang BMS ships an update every 3 weeks, BERTRAM monthly. The most recent releases landed on November 6, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Xiaoxiang BMS | BERTRAM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (67 ratings)](https://appshunter.io/ios/app/xiaoxiang-bms/id1375405426/reviews)** | — |
| Number of ratings | **67** | — |
| Positive reviews | 54.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 14 MB | 27 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [e77code GmbH](https://appshunter.io/developer/1375405425) | [digital cuisine GmbH & Co. KG](https://appshunter.io/developer/1718702628) |

## What reviewers say

### Xiaoxiang BMS

[App page](https://appshunter.io/ios/app/xiaoxiang-bms/id1375405426)

Monitor and manage your Bluetooth-enabled battery management systems (BMS) for Li-Ion and LiFePo4 packs. Track cell voltage, capacity, current, and temperature. Switch battery outputs on/off and configure settings remotely.

**Highlights:** Monitor cell voltage, capacity, current, and temperature, Switch battery output on/off, Calibrate cell voltage and current, Configure balancer and BMS capacity, Change Bluetooth advertised name, Unlock hardware protected BMS (firmware v20+), Set PIN code for BMS access

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $7.99 | one-time |


### BERTRAM

[App page](https://appshunter.io/ios/app/bertram/id6779649965)

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

**In-app purchases:** none


## Frequently asked questions

### Is Xiaoxiang BMS free?

Xiaoxiang BMS is free to download, with in-app purchases available.

### Is BERTRAM free?

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

### Do Xiaoxiang BMS or BERTRAM have ads?

Xiaoxiang BMS shows ads; BERTRAM does not.

### Which is updated more often, Xiaoxiang BMS or BERTRAM?

Xiaoxiang BMS ships an update every 3 weeks, and BERTRAM monthly. Most recently, Xiaoxiang BMS was updated on November 6, 2026 and BERTRAM on November 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.*