# Musashi vs (EXTENDS)BMS バッテリー監視

The clearest difference is update cadence: (EXTENDS)BMS バッテリー監視 at weekly against Musashi's every 10 months. Musashi's advantage is iOS requirement (13.0 vs 17.0). 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.

Musashi ships an update every 10 months, (EXTENDS)BMS バッテリー監視 weekly. The most recent releases landed on September 13, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Musashi | (EXTENDS)BMS バッテリー監視 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Weekly** |
| Size | 238 MB | 3 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MUSASHI HARDWARE MFG. CO., LTD.](https://appshunter.io/developer/1613130539) | [Lancia kitabatake](https://appshunter.io/developer/1852975591) |

## What reviewers say

### Musashi

[App page](https://appshunter.io/ios/app/musashi/id1613130537)

**In-app purchases:** none


### (EXTENDS)BMS バッテリー監視

[App page](https://appshunter.io/ios/app/extendsbms/id6785416713)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Musashi free?

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

### Is (EXTENDS)BMS バッテリー監視 free?

(EXTENDS)BMS バッテリー監視 is free to download, with no in-app purchases.

### Do Musashi or (EXTENDS)BMS バッテリー監視 have ads?

Neither Musashi nor (EXTENDS)BMS バッテリー監視 shows ads.

### Which is updated more often, Musashi or (EXTENDS)BMS バッテリー監視?

Musashi ships an update every 10 months, and (EXTENDS)BMS バッテリー監視 weekly. Most recently, Musashi was updated on September 13, 2026 and (EXTENDS)BMS バッテリー監視 on October 4, 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.*