Comparison

OBDII AI vs UJS OBDII

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

OBDII AI

Features
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OBDII AI is a car diagnostic and monitoring application for DA200.support English,Español,Русский,日本語,中文. Through phone, use Bluetooth to communicate with the vehicle ECU to complete fault diagnosis and driving assistance functions. It has automobile detection and analysis functions such as fault code reading and clearing,performance test, and travel analysis. It also supports high-speed data transmission and has the advantages of low power consumption and ultra-power saving. caution: 1. Support the adapter that runs through Bluetooth 4.0/5.0. 2. The parameters supported by each vehicle are different, which has nothing to do with OBDII AI, but is related to the vehicle control unit. 3. OBDII AI supports DA200 series products.

About

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.

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
Read full description

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

OBDII AI3 screens
UJS OBDII4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

ScorecardNo meaningful differences
OBDII AI versus UJS OBDII: the parameters behind the verdict, then further details
ParameterOBDII AIUJS OBDII
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyMonthly — betterEvery 6 weeks
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPodiPhone, iPod
Requires iOS13.013
Further details — not scored
Size131 MB81 MB
Age rating4+4+
DeveloperShenzhen Chaoyue Technology Development Co.,LtdUJS INC

In-app purchases

None

OBDII AI

No in-app purchases

None

UJS OBDII

No in-app purchases

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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