# Topspeed Battery Assistant vs Yi BMS

The clearest difference is iOS requirement: Yi BMS at 12.0 against Topspeed Battery Assistant's 15. 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.

Topspeed Battery Assistant ships an update every 2 months, Yi BMS every 3 months. The most recent releases landed on August 21, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Topspeed Battery Assistant | Yi BMS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 2 months** | Every 3 months |
| Size | 72 MB | 32 MB |
| Requires iOS | 15 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Hangzhou Xingyun Power Source Technology Co., Ltd.](https://appshunter.io/developer/1681532422) | [Shenzhen Yifang new energy technology Co., Ltd](https://appshunter.io/developer/1727822039) |

## What reviewers say

### Topspeed Battery Assistant

[App page](https://appshunter.io/ios/app/topspeed-battery-assistant/id1628977972)

**Features:** macOS Compatibility

**In-app purchases:** none


### Yi BMS

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Topspeed Battery Assistant free?

Topspeed Battery Assistant is free to download, with no in-app purchases.

### Is Yi BMS free?

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

### Do Topspeed Battery Assistant or Yi BMS have ads?

Both Topspeed Battery Assistant and Yi BMS show ads.

### Which is updated more often, Topspeed Battery Assistant or Yi BMS?

Topspeed Battery Assistant ships an update every 2 months, and Yi BMS every 3 months. Most recently, Topspeed Battery Assistant was updated on August 21, 2026 and Yi BMS on September 21, 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.*