# Green Planet vs CO₂ Aware

The clearest difference is rating: Green Planet at 5.0 against CO₂ Aware's 4.0. Green Planet also leads on iOS requirement (12.0 vs 15.0). CO₂ Aware's advantage is in-app purchases (none vs 3). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Green Planet sells 3 one-off in-app purchases. CO₂ Aware asks for nothing beyond the download.

Green Planet holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

Green Planet ships an update every 5 months, CO₂ Aware every 3 months. The most recent releases landed on September 17, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Green Planet | CO₂ Aware |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/green-planet-classification/id1471939104/reviews)** | [4.0 (2 ratings)](https://appshunter.io/ios/app/co-aware/id1670412338/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 28 MB | 11 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [涛 吴](https://appshunter.io/developer/1194352016) | [Shouzhi Wang](https://appshunter.io/developer/1670412340) |

## What reviewers say

### Green Planet

[App page](https://appshunter.io/ios/app/green-planet-classification/id1471939104)

This app uses AI to help you classify garbage for recycling. It supports a large database of cities and common items, with features like voice and text search. Available on multiple Apple devices, it aims to make waste sorting easier.

**Highlights:** AI garbage classification, 46 cities database, Voice and text search, Camera capture (beta), Apple Watch support, Multi-language support

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy developer for a drink | $0.99 | one-time |
| Buy developer for a coffee | $4.99 | one-time |
| Buy developer for a wine | $14.99 | one-time |


### CO₂ Aware

[App page](https://appshunter.io/ios/app/co-aware/id1670412338)

This app encourages daily actions to combat climate change with a growing interactive tree visualization. It offers environmental news and integrates with Apple Health to promote walking, helping users reduce their carbon footprint.

**Highlights:** Daily climate action tracking, Interactive growing tree visualization, Environmental news abstracts and links, Apple Health integration for step tracking, Photo record of completed actions, Reminder of past accomplishments

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Green Planet free?

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

### Is CO₂ Aware free?

CO₂ Aware is free to download, with no in-app purchases.

### Which has better reviews, Green Planet or CO₂ Aware?

Green Planet is rated higher. Green Planet averages 5.0 out of 5 from 2 ratings, while CO₂ Aware averages 4.0 from 2 ratings.

### Do Green Planet or CO₂ Aware have ads?

Neither Green Planet nor CO₂ Aware shows ads.

### Which is updated more often, Green Planet or CO₂ Aware?

Green Planet ships an update every 5 months, and CO₂ Aware every 3 months. Most recently, Green Planet was updated on September 17, 2026 and CO₂ Aware on September 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.*