# SWEN vs Coal 2 Solar

The clearest difference is ads: Coal 2 Solar at none against SWEN's shown. SWEN's advantage is update cadence (every 2 weeks vs monthly) and iOS requirement (13.0 vs 16.4). On price, 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.

SWEN ships an update every 2 weeks, Coal 2 Solar monthly. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | SWEN | Coal 2 Solar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Monthly |
| Size | 73 MB | 45 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SOL Ventures B.V.](https://appshunter.io/developer/1709486134) | [Ureca](https://appshunter.io/developer/1658246933) |

## What reviewers say

### SWEN

[App page](https://appshunter.io/ios/app/swen-track-compare-and-offset/id6468068461)

**Features:** macOS Compatibility

**In-app purchases:** none


### Coal 2 Solar

[App page](https://appshunter.io/ios/app/coal-2-solar/id6736794539)

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

**In-app purchases:** none


## Frequently asked questions

### Is SWEN free?

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

### Is Coal 2 Solar free?

Coal 2 Solar is free to download, with no in-app purchases.

### Do SWEN or Coal 2 Solar have ads?

SWEN shows ads; Coal 2 Solar does not.

### Which is updated more often, SWEN or Coal 2 Solar?

SWEN ships an update every 2 weeks, and Coal 2 Solar monthly. Most recently, SWEN was updated on October 27, 2026 and Coal 2 Solar 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.*