# Yi BMS vs Smart Controller Pro

The clearest difference is ads: Smart Controller Pro at none against Yi BMS's shown. Smart Controller Pro also leads on update cadence (every 4 days 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, Smart Controller Pro every 4 days. The most recent releases landed on October 8, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Yi BMS | Smart Controller Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/smart-controller-pro/id6768871357/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | — | Free |
| Size | 32 MB | 42 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Shenzhen Yifang new energy technology Co., Ltd](https://appshunter.io/developer/1727822039) | [QI Automotive Co.,Ltd](https://appshunter.io/developer/1635704762) |

## What reviewers say

### Yi BMS

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Smart Controller Pro

[App page](https://appshunter.io/ios/app/smart-controller-pro/id6768871357)

Control your trailer's braking system wirelessly via Bluetooth. Adjust brake parameters, receive alerts for trailer malfunctions, and detect wiring faults for safe and reliable operation.

**Highlights:** Bluetooth connectivity, Trailer braking control, Adjustable brake parameters, Failure alerts, Wiring fault detection

**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 Smart Controller Pro free?

Smart Controller Pro is free to download, with no in-app purchases.

### Do Yi BMS or Smart Controller Pro have ads?

Yi BMS shows ads; Smart Controller Pro does not.

### Which is updated more often, Yi BMS or Smart Controller Pro?

Yi BMS ships an update every 3 months, and Smart Controller Pro every 4 days. Most recently, Yi BMS was updated on October 8, 2026 and Smart Controller Pro on October 9, 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.*