# DeyeOSS vs BMS

The clearest difference is update cadence: DeyeOSS at every 9 days against BMS's every 2 months. DeyeOSS also leads on iOS requirement (11.1 vs 15.0). 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.

DeyeOSS ships an update every 9 days, BMS every 2 months. The most recent releases landed on September 14, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | DeyeOSS | BMS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/bms-tool/id6471949475/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 20.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 months |
| Monetization | — | Free |
| Size | 84 MB | 40 MB |
| Requires iOS | **11.1** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Zhejiang Deye Electrical Appliances Co., Ltd.](https://appshunter.io/developer/1332604988) | [秀丽 唐](https://appshunter.io/developer/1715570419) |

## What reviewers say

### DeyeOSS

[App page](https://appshunter.io/ios/app/deyeoss/id6451098737)

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

**In-app purchases:** none


### BMS

[App page](https://appshunter.io/ios/app/bms-tool/id6471949475)

Monitor and manage your device's battery health with real-time data, historical records, and customizable alerts for over-charge, over-discharge, and temperature. Connect locally via Bluetooth or remotely via Wi-Fi to track battery status, cell performance, and potential issues.

**Highlights:** Real-time battery data (current, voltage, SOC, SOH), Cell-level monitoring, Historical alarm and protection records, Customizable warning values, Bluetooth and Wi-Fi connectivity, Device sharing and management

**In-app purchases:** none


## Frequently asked questions

### Is DeyeOSS free?

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

### Is BMS free?

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

### Do DeyeOSS or BMS have ads?

Neither DeyeOSS nor BMS shows ads.

### Which is updated more often, DeyeOSS or BMS?

DeyeOSS ships an update every 9 days, and BMS every 2 months. Most recently, DeyeOSS was updated on September 14, 2026 and BMS on September 23, 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.*