# Check Engine Chat vs Check Engine

The clearest difference is update cadence: Check Engine at every 2 weeks against Check Engine Chat's monthly. Check Engine also leads on iOS requirement (16.4 vs 26.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Check Engine Chat sells 1 one-off in-app purchase and Check Engine sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Check Engine Chat ships an update monthly, Check Engine every 2 weeks. The most recent releases landed on October 14, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Check Engine Chat | Check Engine |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Size | 2.7 GB | 48 MB |
| Requires iOS | 26.2 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yao Vah Saechao](https://appshunter.io/developer/1845021267) | [REIDT GAVIN WILDE](https://appshunter.io/developer/6787276656) |

## What reviewers say

### 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 |


### Check Engine

[App page](https://appshunter.io/ios/app/check-engine-ai-engine-agent/id6787276654)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $9.99 | per month |
| Shop | $29.99 | per month |


## Frequently asked questions

### Is Check Engine Chat free?

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

### Is Check Engine free?

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

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

Neither Check Engine Chat nor Check Engine shows ads.

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

Check Engine Chat ships an update monthly, and Check Engine every 2 weeks. Most recently, Check Engine Chat was updated on October 14, 2026 and Check Engine on October 15, 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.*