# WWF Wissen vs Green Learning

The clearest difference is review sentiment: WWF Wissen at 100% against Green Learning's 0%. WWF Wissen also leads on in-app purchases (none vs 2) and iOS requirement (11.0 vs 15.1). Green Learning's advantage is update cadence (every 5 weeks vs every 27 months). On price, ads and device support there is nothing between them.

Both are free to download. Green Learning sells 2 in-app purchases, starting at $3.99 per month. WWF Wissen asks for nothing beyond the download.

WWF Wissen ships an update every 27 months, Green Learning every 5 weeks. The most recent releases landed on October 17, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | WWF Wissen | Green Learning |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 5 weeks** |
| Monetization | **Free** | Subscription |
| Size | 109 MB | 66 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [WWF Deutschland](https://appshunter.io/developer/579576854) | [Die Pflanzenschule GbR](https://appshunter.io/developer/1725463366) |

## What reviewers say

### WWF Wissen

[App page](https://appshunter.io/ios/app/wwf-wissen/id780456645)

Explore topics like species protection, biodiversity, and climate change from a nature and environmental protection perspective. This app shares insights from experts to inform and engage users on crucial conservation issues.

**Highlights:** Environmental protection topics, Biodiversity insights, Climate and energy information, Expert perspectives, Nature conservation focus

**Features:** macOS Compatibility

**In-app purchases:** none


### Green Learning

[App page](https://appshunter.io/ios/app/green-learning/id6475961711)

This app offers interactive quizzes based on user-selected subjects and difficulty levels. It features adaptive learning, allowing users to revisit incorrect answers and progress through levels. Users can also compete against others in a quiz arena.

**Highlights:** Customizable quizzes by subject and difficulty, Adaptive learning with repeated incorrect questions, Level progression system, Ability to switch subjects anytime, Competitive quiz arena

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monatliche Zahlung | $3.99 | per month |
| Jährliche Zahlung | $39.90 | per year |


## Frequently asked questions

### Is WWF Wissen free?

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

### Is Green Learning free?

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

### Do WWF Wissen or Green Learning have ads?

Neither WWF Wissen nor Green Learning shows ads.

### Which is updated more often, WWF Wissen or Green Learning?

WWF Wissen ships an update every 27 months, and Green Learning every 5 weeks. Most recently, WWF Wissen was updated on October 17, 2026 and Green Learning on October 8, 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.*