# Diesel CO2 vs Romulus AI

The clearest difference is device support: Diesel CO2 at 3 against Romulus AI's 1. On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

## The numbers

| Metric | Diesel CO2 | Romulus AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | — |
| Size | 2 MB | 114 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Addison Mai](https://appshunter.io/developer/391450820) | [Romulus Ventures LLC](https://appshunter.io/developer/1780937519) |

## What reviewers say

### Diesel CO2

[App page](https://appshunter.io/ios/app/diesel-co2/id471325738)

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

**In-app purchases:** none


### Romulus AI

[App page](https://appshunter.io/ios/app/romulus-ai/id6762613422)

**In-app purchases:** none


## Frequently asked questions

### Is Diesel CO2 free?

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

### Is Romulus AI free?

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

### Do Diesel CO2 or Romulus AI have ads?

Neither Diesel CO2 nor Romulus AI 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.*