# - Footprint vs CO₂ Aware

The clearest difference is rating: - Footprint at 5.0 against CO₂ Aware's 4.0. - Footprint also leads on iOS requirement (12.1 vs 15.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

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

- Footprint ships an update every 2 months, CO₂ Aware every 3 months. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | - Footprint | CO₂ Aware |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/footprint/id1459071794/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 | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free | Free |
| Size | 42 MB | 11 MB |
| Requires iOS | **12.1** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [景程 杨](https://appshunter.io/developer/1745253275) | [Shouzhi Wang](https://appshunter.io/developer/1670412340) |

## What reviewers say

### - Footprint

[App page](https://appshunter.io/ios/app/footprint/id1459071794)

This app helps you reduce your carbon footprint with personalized challenges and daily tips. It focuses on simplicity, offering recommendations based on your lifestyle to encourage eco-friendly habits.

**Highlights:** Carbon footprint tracking, Personalized challenges, Daily eco-friendly tips, Lifestyle recommendations, Push notifications, User-friendly interface

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

**In-app purchases:** none


### 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 - Footprint free?

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

### Is CO₂ Aware free?

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

### Which has better reviews, - Footprint or CO₂ Aware?

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

### Do - Footprint or CO₂ Aware have ads?

Neither - Footprint nor CO₂ Aware shows ads.

### Which is updated more often, - Footprint or CO₂ Aware?

- Footprint ships an update every 2 months, and CO₂ Aware every 3 months. Most recently, - Footprint was updated on October 24, 2026 and CO₂ Aware on October 10, 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.*