# OBDII AI vs UJS OBDII

OBDII AI and UJS OBDII are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

OBDII AI ships an update monthly, UJS OBDII every 6 weeks. The most recent releases landed on October 11, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | OBDII AI | UJS OBDII |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ujs-obdii/id6753165961/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 weeks |
| Monetization | — | Free |
| Size | 131 MB | 81 MB |
| Requires iOS | 13.0 | 13 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Chaoyue Technology Development Co.,Ltd](https://appshunter.io/developer/1223781320) | [UJS INC](https://appshunter.io/developer/1842801577) |

## What reviewers say

### OBDII AI

[App page](https://appshunter.io/ios/app/obdii-ai/id6742878024)

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

**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 OBDII AI free?

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

### Is UJS OBDII free?

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

### Do OBDII AI or UJS OBDII have ads?

Neither OBDII AI nor UJS OBDII shows ads.

### Which is updated more often, OBDII AI or UJS OBDII?

OBDII AI ships an update monthly, and UJS OBDII every 6 weeks. Most recently, OBDII AI was updated on October 11, 2026 and UJS OBDII on October 24, 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.*