# Carburetor CFM vs Check Engine Chat

The clearest difference is in-app purchases: Carburetor CFM at none against Check Engine Chat's 1. Carburetor CFM also leads on update cadence (every 6 days vs monthly) and iOS requirement (13.0 vs 26.2). On price, ads and device support there is nothing between them.

Both are free to download. Check Engine Chat sells 1 one-off in-app purchase. Carburetor CFM asks for nothing beyond the download.

Carburetor CFM ships an update every 6 days, Check Engine Chat monthly. The most recent releases landed on October 4, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Carburetor CFM | Check Engine Chat |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Monthly |
| Size | 40 MB | 2.7 GB |
| Requires iOS | **13.0** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Stage Coding](https://appshunter.io/developer/1637068135) | [Yao Vah Saechao](https://appshunter.io/developer/1845021267) |

## What reviewers say

### Carburetor CFM

[App page](https://appshunter.io/ios/app/carburetor-cfm-calcon/id1619682005)

**Features:** macOS Compatibility

**In-app purchases:** none


### Check Engine Chat

[App page](https://appshunter.io/ios/app/check-engine-chat/id6755978445)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Audio Diagnostics Pro | $4.99 | one-time |


## Frequently asked questions

### Is Carburetor CFM free?

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

### Is Check Engine Chat free?

Check Engine Chat is free to download, with in-app purchases available.

### Do Carburetor CFM or Check Engine Chat have ads?

Neither Carburetor CFM nor Check Engine Chat shows ads.

### Which is updated more often, Carburetor CFM or Check Engine Chat?

Carburetor CFM ships an update every 6 days, and Check Engine Chat monthly. Most recently, Carburetor CFM was updated on October 4, 2026 and Check Engine Chat on October 14, 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.*