# JiaJia Lock vs UstaScan

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.

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.

## The numbers

| Metric | JiaJia Lock | UstaScan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/jiajia-lock/id1458602043/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/ustascan/id6761293520/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 2 days** |
| Monetization | Free | Free |
| Size | 21 MB | 35 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [双超 陈](https://appshunter.io/developer/1454216279) | [Mustafa Yousif](https://appshunter.io/developer/1888717698) |

## What reviewers say

### JiaJia Lock

[App page](https://appshunter.io/ios/app/jiajia-lock/id1458602043)

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

**In-app purchases:** none


### UstaScan

[App page](https://appshunter.io/ios/app/ustascan/id6761293520)

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:** Vision Pro support

**In-app purchases:** none


## Frequently asked 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.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*