# WattTools vs DCS Lithium

The clearest difference is in-app purchases: DCS Lithium at none against WattTools's 2. DCS Lithium also leads on iOS requirement (12.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. WattTools sells 2 in-app purchases, starting at $0.99 per 7 days. DCS Lithium asks for nothing beyond the download.

WattTools ships an update every 3 weeks, DCS Lithium every 2 weeks. The most recent releases landed on October 2, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | WattTools | DCS Lithium |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 101 MB | 27 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [源 张](https://appshunter.io/developer/1649775012) | [Marek Tomolowicz](https://appshunter.io/developer/1535362874) |

## What reviewers say

### WattTools

[App page](https://appshunter.io/ios/app/watttools/id6476344694)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly subscription | $0.99 | per 7 days |
| 3Credits | $0.99 | one-time |


### DCS Lithium

[App page](https://appshunter.io/ios/app/dcs-lithium/id6742028751)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WattTools free?

WattTools is free to download, with in-app purchases available.

### Is DCS Lithium free?

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

### Do WattTools or DCS Lithium have ads?

Neither WattTools nor DCS Lithium shows ads.

### Which is updated more often, WattTools or DCS Lithium?

WattTools ships an update every 3 weeks, and DCS Lithium every 2 weeks. Most recently, WattTools was updated on October 2, 2026 and DCS Lithium on October 11, 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.*