JiaJia Lock vs UstaScan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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;
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.
- AI-powered car diagnostics
- Real-time data monitoring
- Read and clear fault codes
- Performance testing (acceleration, braking)
- Live charts and sensor data
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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
Verdict
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
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 JiaJia Lock against 5.0 for UstaScan. Both are backed by a comparable volume of ratings — 1 and 2 respectively.
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.
| Parameter | JiaJia Lock | UstaScan |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 9 days | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 21 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | 双超 陈 | Mustafa Yousif |
Customer experience
JiaJia Lock
UstaScan
In-app purchases
JiaJia Lock
No in-app purchases
UstaScan
No in-app purchases









