# 2zero Climathon vs Solawi Langendorf

The clearest difference is update cadence: 2zero Climathon at every 2 weeks against Solawi Langendorf's every 21 months. 2zero Climathon also leads on device support (3 vs 1). On price, ads, in-app purchases 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.

2zero Climathon ships an update every 2 weeks, Solawi Langendorf every 21 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | 2zero Climathon | Solawi Langendorf |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/2zero-climathon/id1458584431/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 47.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 21 months |
| Monetization | Free | — |
| Size | 89 MB | 16 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [2zero GmbH](https://appshunter.io/developer/1624455527) | [Solidarische Landwirtschaft Langendorf e. V.](https://appshunter.io/developer/1616823871) |

## What reviewers say

### 2zero Climathon

[App page](https://appshunter.io/ios/app/2zero-climathon/id1458584431)

This app helps you actively reduce your carbon footprint through a CO2 calculator and various challenges. Join communities or Klimathons to compete and earn rewards for your climate protection efforts. It's designed for a CO2-neutral future.

**Highlights:** CO2 calculator, Climate challenges, Sustainability rewards, Team competitions, News and tips, Community participation

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

**In-app purchases:** none


### Solawi Langendorf

[App page](https://appshunter.io/ios/app/solawi-langendorf/id1616823869)

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

**In-app purchases:** none


## Frequently asked questions

### Is 2zero Climathon free?

2zero Climathon is free to download, with no in-app purchases.

### Is Solawi Langendorf free?

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

### Do 2zero Climathon or Solawi Langendorf have ads?

Neither 2zero Climathon nor Solawi Langendorf shows ads.

### Which is updated more often, 2zero Climathon or Solawi Langendorf?

2zero Climathon ships an update every 2 weeks, and Solawi Langendorf every 21 months. Most recently, 2zero Climathon was updated on November 3, 2026 and Solawi Langendorf on November 3, 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.*