# No CO2 vs SpeechMaxx

The clearest difference is in-app purchases: No CO2 at none against SpeechMaxx's 2. No CO2 also leads on iOS requirement (12.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. SpeechMaxx sells 2 in-app purchases, starting at $6.99 per month. No CO2 asks for nothing beyond the download.

## The numbers

| Metric | No CO2 | SpeechMaxx |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/speechmaxx/id6762529876/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Monetization | — | Freemium |
| Size | 27 MB | 42 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Davidson](https://appshunter.io/developer/1790097360) | [Aleksander Lucenko](https://appshunter.io/developer/1824019071) |

## What reviewers say

### No CO2

[App page](https://appshunter.io/ios/app/no-co2/id6747688511)

**Features:** macOS Compatibility

**In-app purchases:** none


### SpeechMaxx

[App page](https://appshunter.io/ios/app/speechmaxx/id6762529876)

This AI-powered coach provides real-time feedback on your voice, helping you articulate better and communicate with confidence. Practice various real-world scenarios, engage in daily speaking drills, and improve your vocabulary for impactful conversations.

**Highlights:** Live AI voice coaching, Real-world scenario practice, Daily speaking drills, Vocabulary training, SkillScore and analytics, Pitch simulator, Gamified learning with XP

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $6.99 | per month |
| Annual Subscription | $39.99 | per year |


## Frequently asked questions

### Is No CO2 free?

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

### Is SpeechMaxx free?

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

### Do No CO2 or SpeechMaxx have ads?

Neither No CO2 nor SpeechMaxx shows ads.

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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.*