# Zayed Green Challenge vs Hamda

The clearest difference is update cadence: Hamda at daily against Zayed Green Challenge's every 2 months. Hamda also leads on iOS requirement (9.0 vs 13.0). 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.

Zayed Green Challenge ships an update every 2 months, Hamda daily. The most recent releases landed on October 8, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Zayed Green Challenge | Hamda |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/zayed-green-challenge/id1013437617/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Daily** |
| Monetization | Free | — |
| Size | 46 MB | 375 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SHEIKH ZAYED INTERNATIONAL PRIZE FOR THE ENVIRONMENT EST.](https://appshunter.io/developer/1303382587) | [Wadhah Belshalat](https://appshunter.io/developer/1481499626) |

## What reviewers say

### Zayed Green Challenge

[App page](https://appshunter.io/ios/app/zayed-green-challenge/id1013437617)

This application aims to raise environmental awareness by promoting sustainable development goals. It was founded by the Zayed International Foundation for the Environment to recognize and encourage environmental achievements.

**Highlights:** Environmental awareness, Sustainable development goals, Promotes environmental achievements, Founded by Zayed International Foundation

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

**In-app purchases:** none


### Hamda

[App page](https://appshunter.io/ios/app/hamda/id1482154620)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Zayed Green Challenge free?

Zayed Green Challenge is free to download, with no in-app purchases.

### Is Hamda free?

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

### Do Zayed Green Challenge or Hamda have ads?

Neither Zayed Green Challenge nor Hamda shows ads.

### Which is updated more often, Zayed Green Challenge or Hamda?

Zayed Green Challenge ships an update every 2 months, and Hamda daily. Most recently, Zayed Green Challenge was updated on October 8, 2026 and Hamda on September 28, 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.*