# UstaScan vs Check Engine

The clearest difference is in-app purchases: UstaScan at none against Check Engine's 2. UstaScan also leads on update cadence (every 2 days vs every 2 weeks) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Check Engine sells 2 in-app purchases, starting at $9.99 per month. UstaScan asks for nothing beyond the download.

UstaScan ships an update every 2 days, Check Engine every 2 weeks. The most recent releases landed on October 7, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | UstaScan | Check Engine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ustascan/id6761293520/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 2 weeks |
| Monetization | Free | — |
| Size | 35 MB | 48 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mustafa Yousif](https://appshunter.io/developer/1888717698) | [REIDT GAVIN WILDE](https://appshunter.io/developer/6787276656) |

## What reviewers say

### UstaScan

[App page](https://appshunter.io/ios/app/ustascan/id6761293520)

This app uses AI to diagnose your car's issues by connecting to its OBD2 port via Bluetooth. It provides real-time data, reads and clears fault codes, and offers performance testing. Monitor your vehicle's health with live charts and detailed sensor information.

**Highlights:** AI-powered car diagnostics, Real-time data monitoring, Read and clear fault codes, Performance testing (acceleration, braking), Live charts and sensor data

**Features:** Vision Pro support

**In-app purchases:** none


### 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 UstaScan free?

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

### Is Check Engine free?

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

### Do UstaScan or Check Engine have ads?

Neither UstaScan nor Check Engine shows ads.

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

UstaScan ships an update every 2 days, and Check Engine every 2 weeks. Most recently, UstaScan was updated on October 7, 2026 and Check Engine on October 15, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*