Dauntless OBD vs UJS OBDII
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dauntless OBD
Configure your DauntlessOBD device wirelessly. Access vehicle data streams, diagnostic trouble codes, and manage firmware updates. Requires a DauntlessOBD device for full functionality.
- Wireless pairing
- Firmware updates
- Vehicle data streams
- Diagnostic trouble codes
- Device configuration
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Official configuration app for the DauntlessOBD device. This app will help you with wireless pairing, firmware updates, and common vehicle data streams and diagnostic trouble codes. A DauntlessOBD device from Dauntless Devices LLC is required to use this app. Other devices are not supported.
UJS OBDII
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.
- 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
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UJS OBD is exclusively designed to support UJS OBDII series products, serving as a professional car diagnostic and real-time monitoring application. It offers multi-language support, including English, Español, Русский, 日本語，and 中文，ensuring seamless usability for users worldwide. By connecting your smartphone to the UJS OBDII vehicle terminal via Bluetooth, the app enables comprehensive vehicle management—covering core functions such as fault code reading & clearing, real-time instrument panel display, vehicle performance testing, and detailed travel analysis. It also features high-speed data transmission capabilities, paired with outstanding low-power consumption and ultra-energy-saving performance, ensuring long-lasting use without excessive battery drain. Caution: 1. This app only supports adapters compatible with Bluetooth 4.0/5.0. 2. The range of parameters accessible for each vehicle varies and is determined by the vehicle’s own control unit, not by the UJS OBD app. 3. UJS OBD is specifically optimized for use with UJS OBDII series products; compatibility with other devices is not guaranteed.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Dauntless OBD | UJS OBDII |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (10 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 10 — better | 1 |
| Update frequency | Every 3 weeks — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 13 — better |
| Further details — not scored | ||
| Size | 2 MB | 81 MB |
| Age rating | 4+ | 4+ |
| Developer | Dauntless Devices LLC | UJS INC |
Customer experience
Dauntless OBD
UJS OBDII
In-app purchases
Dauntless OBD
No in-app purchases
UJS OBDII
No in-app purchases
Questions
Is Dauntless OBD free?
Is UJS OBDII free?
Which has better reviews, Dauntless OBD or UJS OBDII?
Do Dauntless OBD or UJS OBDII have ads?
Which is updated more often, Dauntless OBD or UJS OBDII?
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