# Yi BMS vs PURE BMS

The clearest difference is ads: PURE BMS at none against Yi BMS's shown. PURE BMS also leads on update cadence (every 3 weeks vs every 3 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Yi BMS ships an update every 3 months, PURE BMS every 3 weeks. The most recent releases landed on September 21, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Yi BMS | PURE BMS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 32 MB | 64 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Shenzhen Yifang new energy technology Co., Ltd](https://appshunter.io/developer/1727822039) | [PUR ENERGY LIMITED](https://appshunter.io/developer/1840637435) |

## What reviewers say

### Yi BMS

[App page](https://appshunter.io/ios/app/yi-bms/id6476804812)

**Features:** macOS Compatibility

**In-app purchases:** none


### PURE BMS

[App page](https://appshunter.io/ios/app/pure-bms/id6752708686)

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

**In-app purchases:** none


## Frequently asked questions

### Is Yi BMS free?

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

### Is PURE BMS free?

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

### Do Yi BMS or PURE BMS have ads?

Yi BMS shows ads; PURE BMS does not.

### Which is updated more often, Yi BMS or PURE BMS?

Yi BMS ships an update every 3 months, and PURE BMS every 3 weeks. Most recently, Yi BMS was updated on September 21, 2026 and PURE BMS on September 8, 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.*