Comparison

Green Planet vs CO₂ Aware

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Green Planet

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
Read full description

# Introduction A simple AI garbage classification application for our green planet. # Features - Support 46 Cities Garbage Classification Database - Support Apple Watch - Support Voice Search - Support Text Search - Support Camera Capture (beta, via AI technology, support 40 common items at current version) - Support Siri - Support English, Traditional Chinese and Simplified Chinese - Support iPhone, and iPad # Feedback If you like this application please kindly give 5 stars. Any feedback and recommendation please click Email icon in about page.

About

CO₂ Aware

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
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Leaving a smaller footprint requires change. CO₂ Aware is a high school student project focuses on small, daily actions that individuals can take to enable great change. People of today believe in technology, and we believe technology can also help mitigate the problem of climate change. This app includes dozens of essential actions that help you to be aware of climate change. An interactive tree is visible on the home page. As you complete more actions, it grows. This visualization allows you to experience tangibly and profoundly what you contribute to a better environment. Furthermore, you can take a picture when they complete an action, which serves as a record of your contribution. A section on the front page also shows a random action completed in the past, reminding your past accomplishments. Beyond actions, CO2 Aware also provides abstracts and links to high-quality news articles from renowned sources that allow you to acquire environmental knowledge. This app integrates with Apple Health on your iPhone in order to acquire your steps data and encourage you to walk. This helps reduce physical inactivity and prevents air pollution. We do not upload or analyze any data. We will be adding more thrilling features in the future. Just wait and see! Thanks for downloading this app. If you have any questions or comments, don't hesitate to send an email to shoguns.lenses.0s@icloud.com

Screenshots

Green Planet4 screens
CO₂ Aware4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
Green Planet versus CO₂ Aware: the parameters behind the verdict, then further details
ParameterGreen PlanetCO₂ Aware
PriceFreeFree
Rating5.0 (2 ratings) — better4.0 (2 ratings)
Positive reviews100.0% of reviews—
Number of ratings22
Update frequencyEvery 5 monthsEvery 3 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size28 MB11 MB
Age rating4+4+
Developer涛 吴Shouzhi Wang

Customer experience

Green Planet

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews21 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

CO₂ Aware

All ratings2 ratings
Positive50.0%
Neutral50.0%
Negative0.0%

In-app purchases

3 purchases

Green Planet

One-time3
  • Buy developer for a drink$0.99
  • Buy developer for a coffee$4.99
  • Buy developer for a wine$14.99
None

CO₂ Aware

No in-app purchases

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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