# AG LITHIUM vs Sunlink BMS

The clearest difference is update cadence: Sunlink BMS at every 3 months against AG LITHIUM's every 9 months. Sunlink BMS also leads on iOS requirement (9.0 vs 12.0). 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.

AG LITHIUM ships an update every 9 months, Sunlink BMS every 3 months. The most recent releases landed on September 15, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | AG LITHIUM | Sunlink BMS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 months** |
| Size | 42 MB | 35 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [AG AUTOMOTIVE GmbH](https://appshunter.io/developer/1581086009) | [Shenzhen RF-star Technology Co., Ltd](https://appshunter.io/developer/1513126062) |

## What reviewers say

### AG LITHIUM

[App page](https://appshunter.io/ios/app/ag-lithium/id1582129708)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sunlink BMS

[App page](https://appshunter.io/ios/app/sunlink-bms/id1600652052)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AG LITHIUM free?

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

### Is Sunlink BMS free?

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

### Do AG LITHIUM or Sunlink BMS have ads?

Neither AG LITHIUM nor Sunlink BMS shows ads.

### Which is updated more often, AG LITHIUM or Sunlink BMS?

AG LITHIUM ships an update every 9 months, and Sunlink BMS every 3 months. Most recently, AG LITHIUM was updated on September 15, 2026 and Sunlink BMS on October 4, 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.*