# BMS电池卫士 vs E

The clearest difference is update cadence: E at every 5 weeks against BMS电池卫士's every 44 months. 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.

BMS电池卫士 ships an update every 44 months, E every 5 weeks. The most recent releases landed on May 14, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | BMS电池卫士 | E |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 44 months | **Every 5 weeks** |
| Size | 9 MB | 33 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [锦欢 林](https://appshunter.io/developer/1467148377) | [建军 刘](https://appshunter.io/developer/1718671617) |

## What reviewers say

### BMS电池卫士

[App page](https://appshunter.io/ios/app/bms/id1501118106)

**Features:** macOS Compatibility

**In-app purchases:** none


### E

[App page](https://appshunter.io/ios/app/e-bms/id6473353474)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BMS电池卫士 free?

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

### Is E free?

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

### Do BMS电池卫士 or E have ads?

Neither BMS电池卫士 nor E shows ads.

### Which is updated more often, BMS电池卫士 or E?

BMS电池卫士 ships an update every 44 months, and E every 5 weeks. Most recently, BMS电池卫士 was updated on May 14, 2026 and E on September 13, 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.*