# AG LITHIUM vs WATTSTUNDESOLAR

The clearest difference is update cadence: WATTSTUNDESOLAR at every 5 weeks against AG LITHIUM's every 9 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.

AG LITHIUM ships an update every 9 months, WATTSTUNDESOLAR every 5 weeks. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | AG LITHIUM | WATTSTUNDESOLAR |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 5 weeks** |
| Size | 42 MB | 52 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [AG AUTOMOTIVE GmbH](https://appshunter.io/developer/1581086009) | [江西达伙网络科技有限公司](https://appshunter.io/developer/1234844673) |

## What reviewers say

### AG LITHIUM

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

**Features:** macOS Compatibility

**In-app purchases:** none


### WATTSTUNDESOLAR

[App page](https://appshunter.io/ios/app/wattstundesolar/id6449745523)

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

**In-app purchases:** none


## Frequently asked questions

### Is AG LITHIUM free?

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

### Is WATTSTUNDESOLAR free?

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

### Do AG LITHIUM or WATTSTUNDESOLAR have ads?

Neither AG LITHIUM nor WATTSTUNDESOLAR shows ads.

### Which is updated more often, AG LITHIUM or WATTSTUNDESOLAR?

AG LITHIUM ships an update every 9 months, and WATTSTUNDESOLAR every 5 weeks. Most recently, AG LITHIUM was updated on October 27, 2026 and WATTSTUNDESOLAR on October 30, 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.*