# iOBD2 vs Authorized Unlock

The clearest difference is iOS requirement: iOBD2 at 4.3 against Authorized Unlock's 12.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

iOBD2 ships an update every 3 months, Authorized Unlock every 4 months. The most recent releases landed on October 20, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | iOBD2 | Authorized Unlock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (19 ratings)](https://appshunter.io/ios/app/iobd2-dtc/id710380105/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Free | — |
| Size | 44 MB | 80 MB |
| Requires iOS | **4.3** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [翔宇 金](https://appshunter.io/developer/528881861) | [SHENZHEN JOINT TECHNOLOGY CO.,LTD](https://appshunter.io/developer/1070842011) |

## What reviewers say

### iOBD2

[App page](https://appshunter.io/ios/app/iobd2-dtc/id710380105)

This app serves as a reference for standard Diagnostic Trouble Codes (DTCs) found in vehicles. It helps users understand fault codes generated by a car's onboard computer, aiding in problem diagnosis.

**Highlights:** Diagnostic Trouble Code reference, Fault code lookup, Vehicle system diagnostics, Problem identification

**Features:** macOS Compatibility

**In-app purchases:** none


### Authorized Unlock

[App page](https://appshunter.io/ios/app/authorized-unlock/id6445982270)

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

**In-app purchases:** none


## Frequently asked questions

### Is iOBD2 free?

iOBD2 is free to download, with no in-app purchases.

### Is Authorized Unlock free?

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

### Do iOBD2 or Authorized Unlock have ads?

Neither iOBD2 nor Authorized Unlock shows ads.

### Which is updated more often, iOBD2 or Authorized Unlock?

iOBD2 ships an update every 3 months, and Authorized Unlock every 4 months. Most recently, iOBD2 was updated on October 20, 2026 and Authorized Unlock on October 4, 2026.

---

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