# Xiaoxiang BMS vs OnFocus

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

Both are free to download. Xiaoxiang BMS sells 1 one-off in-app purchase and OnFocus sells 4 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Xiaoxiang BMS ships an update every 4 weeks, OnFocus every 5 days. The most recent releases landed on October 15, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Xiaoxiang BMS | OnFocus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (66 ratings)](https://appshunter.io/ios/app/xiaoxiang-bms/id1375405426/reviews)** | — |
| Number of ratings | **66** | — |
| Positive reviews | 54.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 weeks | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 94 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [e77code GmbH](https://appshunter.io/developer/1375405425) | [Luca Ercolano](https://appshunter.io/developer/1895038993) |

## 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 |


### OnFocus

[App page](https://appshunter.io/ios/app/onfocus/id6762843164)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OnFocus Pro (Monthly) | $2.99 | per month |
| OnFocus Pro (Monthly) | $3.99 | per month |
| OnFocus Pro (Yearly) | $24.99 | per year |
| OnFocus Pro (Yearly) | $44.99 | per year |


## Frequently asked questions

### Is Xiaoxiang BMS free?

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

### Is OnFocus free?

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

### Do Xiaoxiang BMS or OnFocus have ads?

Xiaoxiang BMS shows ads; OnFocus does not.

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

Xiaoxiang BMS ships an update every 4 weeks, and OnFocus every 5 days. Most recently, Xiaoxiang BMS was updated on October 15, 2026 and OnFocus on October 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*