# WEST BMS vs Aray Power

The clearest difference is iOS requirement: WEST BMS at 11.0 against Aray Power's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | WEST BMS | Aray Power |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Size | 159 MB | 34 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Wright Energy Storage Technologies, Inc](https://appshunter.io/developer/1738814783) | [深圳市傲雷新能源科技有限公司](https://appshunter.io/developer/1830665558) |

## What reviewers say

### WEST BMS

[App page](https://appshunter.io/ios/app/west-bms/id6480369505)

**In-app purchases:** none


### Aray Power

[App page](https://appshunter.io/ios/app/aray-power/id6749478017)

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

**In-app purchases:** none


## Frequently asked questions

### Is WEST BMS free?

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

### Is Aray Power free?

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

### Do WEST BMS or Aray Power have ads?

Neither WEST BMS nor Aray Power shows ads.

### Which is updated more often, WEST BMS or Aray Power?

WEST BMS ships an update monthly, and Aray Power monthly. Most recently, WEST BMS was updated on October 25, 2026 and Aray Power on October 24, 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.*