Comparison

JiaJia Lock vs UstaScan

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

Head to head
About

JiaJia Lock

Manage and operate smart lock devices remotely via Bluetooth. This app allows one-click unlocking, password and IC card management, and real-time monitoring of lock status and battery life.

Highlights
  • One-click door unlocking
  • Manage multiple smart locks
  • Distribute temporary or permanent passwords
  • Add and manage IC cards
  • Remote password sharing
  • View unlocking records
  • Monitor lock battery status
Read full description

This application is a mobile app for every smart lock. Connect the smart lock device through the Bluetooth of the mobile phone and bind it to the mobile phone account. Users can visually manage and operate the device, completely say goodbye to the key troubles, redefine the unlocking method, and open a new smart life. APP main functions: 1. Open the door with one click; 2. An account manages multiple smart lock devices, and can distribute permanent, time-limited, single, recurring, and authorization type passwords to users with different needs for each smart lock. The administrator uses the clear password to set the password used by the user to Invalid password, real-time management of generated password; 3. Users can add IC cards with permanent, time-limiting, single-time, and circulation permission types to users with different door opening permissions; administrators can delete, modify and manage IC cards directly without IC cards, and manage IC cards in real time ; 4. Remote password sharing; 5. The user can synchronize the data of the smart lock, view the unlocking record of each lock in real time, and grasp the status of the smart lock opening; 6. Real-time view of smart lock battery;

About

UstaScan

This app uses AI to diagnose your car's issues by connecting to its OBD2 port via Bluetooth. It provides real-time data, reads and clears fault codes, and offers performance testing. Monitor your vehicle's health with live charts and detailed sensor information.

Highlights
  • AI-powered car diagnostics
  • Real-time data monitoring
  • Read and clear fault codes
  • Performance testing (acceleration, braking)
  • Live charts and sensor data
Features
Read full description

UstaScan is a powerful OBD2 car diagnostic app that connects to your vehicle via Bluetooth. Monitor real-time data including speed, RPM, engine temperature, and battery voltage. Read and clear fault codes (DTCs), run AI-powered diagnostics, and test your car's performance with acceleration and braking tests. Stay on top of your vehicle's health with live charts and detailed sensor data.

Screenshots

JiaJia Lock4 screens
UstaScan4 screens

Verdict

The call

The clearest difference is update cadence: UstaScan at every 2 days against JiaJia Lock's every 9 days. JiaJia Lock's advantage is iOS requirement (9.0 vs 12.0). On price, rating, ratings volume 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for JiaJia Lock against 5.0 for UstaScan. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

UpkeepUpdate frequency

JiaJia Lock ships an update every 9 days, UstaScan every 2 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
JiaJia Lock versus UstaScan: the parameters behind the verdict, then further details
ParameterJiaJia LockUstaScan
PriceFreeFree
Rating5.0 (1 ratings)5.0 (2 ratings)
Positive reviews100.0% of reviews—
Number of ratings12 — better
Update frequencyEvery 9 daysEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS9.0 — better12.0
Further details — not scored
Size21 MB35 MB
Age rating4+4+
Developer双超 陈Mustafa Yousif

Customer experience

JiaJia Lock

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

UstaScan

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

JiaJia Lock

No in-app purchases

None

UstaScan

No in-app purchases

Questions

Is JiaJia Lock free?
JiaJia Lock is free to download, with no in-app purchases.
Is UstaScan free?
UstaScan is free to download, with no in-app purchases.
Which has better reviews, JiaJia Lock or UstaScan?
JiaJia Lock and UstaScan are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do JiaJia Lock or UstaScan have ads?
Neither JiaJia Lock nor UstaScan shows ads.
Which is updated more often, JiaJia Lock or UstaScan?
JiaJia Lock ships an update every 9 days, and UstaScan every 2 days. Most recently, JiaJia Lock was updated on November 3, 2026 and UstaScan on October 31, 2026.

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