# Troodon OBD vs UJS OBD Pro

The clearest difference is iOS requirement: UJS OBD Pro at 13 against Troodon OBD's 15.0. 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.

Troodon OBD ships an update every 3 weeks, UJS OBD Pro every 5 weeks. Both last shipped on October 17, 2026.

## The numbers

| Metric | Troodon OBD | UJS OBD Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Size | 27 MB | 148 MB |
| Requires iOS | 15.0 | **13** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DevCom spol. s r.o.](https://appshunter.io/developer/1725153456) | [UJS INC](https://appshunter.io/developer/1842801577) |

## What reviewers say

### Troodon OBD

[App page](https://appshunter.io/ios/app/troodon-obd/id6475777811)

**Features:** macOS Compatibility

**In-app purchases:** none


### UJS OBD Pro

[App page](https://appshunter.io/ios/app/ujs-obd-pro/id6761961923)

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

**In-app purchases:** none


## Frequently asked questions

### Is Troodon OBD free?

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

### Is UJS OBD Pro free?

UJS OBD Pro is free to download, with no in-app purchases.

### Do Troodon OBD or UJS OBD Pro have ads?

Neither Troodon OBD nor UJS OBD Pro shows ads.

### Which is updated more often, Troodon OBD or UJS OBD Pro?

Troodon OBD ships an update every 3 weeks, and UJS OBD Pro every 5 weeks. Most recently, Troodon OBD was updated on October 17, 2026 and UJS OBD Pro on October 17, 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.*