# Xiaoxiang BMS vs Rapid_AI

The clearest difference is in-app purchases: Rapid_AI at none against Xiaoxiang BMS's 1. Rapid_AI also leads on ads (none vs shown) and update cadence (every 5 days vs every 4 weeks). On price, device support and iOS requirement there is nothing between them.

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

Xiaoxiang BMS ships an update every 4 weeks, Rapid_AI every 5 days. The most recent releases landed on October 26, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Xiaoxiang BMS | Rapid_AI |
| --- | --- | --- |
| 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 4 weeks | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 13 MB | 58 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [e77code GmbH](https://appshunter.io/developer/1375405425) | [CyBrains Nova Private Limited](https://appshunter.io/developer/1879824485) |

## 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 |


### Rapid_AI

[App page](https://appshunter.io/ios/app/rapid-ai/id6787379833)

**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 Rapid_AI free?

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

### Do Xiaoxiang BMS or Rapid_AI have ads?

Xiaoxiang BMS shows ads; Rapid_AI does not.

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

Xiaoxiang BMS ships an update every 4 weeks, and Rapid_AI every 5 days. Most recently, Xiaoxiang BMS was updated on October 26, 2026 and Rapid_AI 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.*