# Dauntless OBD vs UJS OBDII

The clearest difference is ratings volume: Dauntless OBD at 10 against UJS OBDII's 1. Dauntless OBD also leads on update cadence (every 3 weeks vs every 6 weeks). UJS OBDII's advantage is iOS requirement (13 vs 15.0). On price, rating, review sentiment and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Dauntless OBD against 5.0 for UJS OBDII. That said, the two scores are not equally well evidenced: Dauntless OBD has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Dauntless OBD ships an update every 3 weeks, UJS OBDII every 6 weeks. The most recent releases landed on August 30, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Dauntless OBD | UJS OBDII |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (10 ratings)](https://appshunter.io/ios/app/dauntless-obd/id6467540766/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/ujs-obdii/id6753165961/reviews) |
| Number of ratings | **10** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Monetization | Free | Free |
| Size | 2 MB | 81 MB |
| Requires iOS | 15.0 | **13** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dauntless Devices LLC](https://appshunter.io/developer/1706964112) | [UJS INC](https://appshunter.io/developer/1842801577) |

## What reviewers say

### Dauntless OBD

[App page](https://appshunter.io/ios/app/dauntless-obd/id6467540766)

Configure your DauntlessOBD device wirelessly. Access vehicle data streams, diagnostic trouble codes, and manage firmware updates. Requires a DauntlessOBD device for full functionality.

**Highlights:** Wireless pairing, Firmware updates, Vehicle data streams, Diagnostic trouble codes, Device configuration

**In-app purchases:** none


### UJS OBDII

[App page](https://appshunter.io/ios/app/ujs-obdii/id6753165961)

This professional car diagnostic app connects to UJS OBDII devices via Bluetooth to read and clear fault codes, monitor real-time vehicle performance, and analyze travel data. It supports multiple languages and offers high-speed, low-power data transmission.

**Highlights:** Fault code reading and clearing, Real-time instrument panel display, Vehicle performance testing, Detailed travel analysis, Multi-language support, High-speed data transmission, Low-power consumption

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Dauntless OBD free?

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

### Is UJS OBDII free?

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

### Which has better reviews, Dauntless OBD or UJS OBDII?

Dauntless OBD and UJS OBDII are both rated 5.0 out of 5 on the App Store, from 10 and 1 ratings respectively.

### Do Dauntless OBD or UJS OBDII have ads?

Neither Dauntless OBD nor UJS OBDII shows ads.

### Which is updated more often, Dauntless OBD or UJS OBDII?

Dauntless OBD ships an update every 3 weeks, and UJS OBDII every 6 weeks. Most recently, Dauntless OBD was updated on August 30, 2026 and UJS OBDII on June 1, 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.*