# EZdiag

> Smartphone-based OBDII diagnostic tool for professional technicians. (iPhone/iPad app by Launch Tech Co., Ltd.)

- Source: https://appshunter.io/ios/app/ezdiag/id1038281404 (this page in markdown: same URL + `.md`)
- Developer: [Launch Tech Co., Ltd](https://appshunter.io/developer/447568418)
- Category: Utilities, Social Networking
- Price: Free
- Rating: 1.60/5 from 40 App Store ratings · 62 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 17 MB
- Languages: American English, French (France), German (Germany), Korean, European Portuguese, Russian, Chinese (Simplified, China), European Spanish
- Released: 2015-12-10
- Data updated: 2026-07-28
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/ezdiag/id1038281404/reviews.md

## What is EZdiag?

EZdiag is a smart phone based OBDII diagnostic tool designed with the professional technician in mind. The device is small and portable, yet powerful enough to rival its competitors. Users have the option to purchase manufacturer specific carline software based on their needs. This feature allows for full-system diagnostics including bi-directional capabilities, quickly and easily from the convenience of your smart phone.

## Key features

- Smartphone-based OBDII diagnostics
- Full-system diagnostics
- Bi-directional capabilities
- Manufacturer-specific software options
- Portable and powerful device

## Recent user reviews (10 of 62)

All indexed reviews: https://appshunter.io/ios/app/ezdiag/id1038281404/reviews.md

### 1/5 — Scam

*2025-11-23, version 6.4.7*

I just downloaded it to try it out and the only thing it does is send you to Amazon to buy random things…. Absolutely no customer support to be found on the app either.

### 1/5 — Stopped working

*2025-10-21, version 6.4.7*

Not supported iOS 17 and above

### 2/5 — Not working with iOS 18

*2025-03-01, version 6.4.7*

Please update, its not working with iOS 18

### 1/5 — Not working

*2025-01-07, version 6.4.7*

I recently replaced my iPhone and reinstalled this app. So far, I have not been able to get it to work with my device. I successfully logged in and installed its associated diagnostic app. It is not a good app period.

### 1/5 — A

*2024-10-06, version 6.4.7*

Not working maybe one year... :(

### 1/5 — Not working!

*2024-04-28, version 6.4.7*

Update for iOS 17!

### 1/5 — Used to be great

*2024-03-09, version 6.4.7*

Apple should remove this from the store.  It no longer works on ios17 and the manufacturer seems to have no interest in updating it to work.  Messaged the manufacturer and doesn’t seem there will be ongoing support so there goes all the software packages I bought.  Bought a real scan tool instead since can’t guarantee future support with app based products.

### 1/5 — Stopped working !

*2024-03-06, version 6.4.7*

This thing used to work amazingly back in the day.. spent HUNDREDS of dollars to download the diagnostic softwares for several manufacturers, and for some reason the “old version “ stopped working and it asks u to download the “new version” which doesn’t support or even showwww any manufacturers ! Fix it guys! It used to be the magic stick !!

### 2/5 — Not working!

*2024-01-15, version 6.4.7*

When update app for IOS17? Not working now!!!

### 1/5 — Don’t work

*2024-01-13, version 6.4.7*

I emailed the company icarscan they said that the EZdiag app doesn’t work with the ios17 why don’t they fix it

## Frequently asked questions about EZdiag

### What does EZdiag do?

EZdiag is a smartphone-based OBDII diagnostic tool designed for professional technicians. It allows users to perform full-system diagnostics on vehicles, including bi-directional capabilities, directly from their smartphone.

### What are the key features of EZdiag?

Key features include its smartphone-based operation, full-system diagnostics, bi-directional control capabilities, and the option to purchase manufacturer-specific carline software. The device itself is designed to be small, portable, and powerful.

### How is EZdiag monetized?

While the core diagnostic tool is available, users have the option to purchase manufacturer-specific carline software. This indicates a 'free with in-app purchases' monetization model, where the base functionality might be free but advanced features or specific vehicle support require additional purchases.

### Who is EZdiag intended for?

This application is specifically designed with the professional technician in mind. It aims to provide powerful diagnostic capabilities in a convenient and portable format for automotive repair professionals.

### What kind of diagnostics can I perform with EZdiag?

EZdiag enables full-system diagnostics, meaning it can access and analyze various modules within a vehicle's system. It also supports bi-directional capabilities, allowing for control and testing of specific vehicle components.

## Version history (last 5 releases)

### 6.4.7 — 2019-05-16

1. Fix bugs

### 6.4.6 — 2019-05-13

1.Fix Bluetooth Connection bug

### 6.4.5 — 2018-11-01

1. Fix software upgrade bug

### 6.4.4 — 2018-09-06

1. Fully adapt the iPhoneX
2. Diagnostic function main app provides new and old apk entrance
3. Support new diagnostic app software upgrade function
4. Software renewal upgrade opens
5. Connector switching increases latitude and longitude parameters
6. "Contact Us" icon size adjustment
7. Fix MDiag can't see the full-featured menu bug, MDiag connector develops full-featured diagnostics

### 6.4.3 — 2018-07-06

1. Some EZCheck connectors add trip statistics
2. Fix some bugs

## Apps similar to EZdiag

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Car autodio](https://appshunter.io/ios/app/car-autodio/id6748116135) | — | Free | Utilities |
| [ASD60](https://appshunter.io/ios/app/asd60/id1457787878) | — | Free | Utilities |
| [AudioConfig](https://appshunter.io/ios/app/audioconfig/id6483211213) | — | Free | Utilities |
| [Dauntless OBD](https://appshunter.io/ios/app/dauntless-obd/id6467540766) | 5.0 (10) | Free | Utilities |
| [FORScan Viewer](https://appshunter.io/ios/app/forscan-viewer/id1344642568) | 2.7 (103) | Free | Utilities |
| [Circtek](https://appshunter.io/ios/app/circtek/id6503061522) | — | Free | Utilities |

## More apps by Launch Tech Co., Ltd

- [golo](https://appshunter.io/ios/app/golo/id694984827)
- [AutoLaunch](https://appshunter.io/ios/app/autolaunch/id731793131)
- [golo carcare](https://appshunter.io/ios/app/golo-carcare/id931192106)
- [golo汽修大师](https://appshunter.io/ios/app/golo/id983852519)
- [Auto Diag-PRO diagnosis](https://appshunter.io/ios/app/auto-diag-pro-diagnosis/id1002243564)

All apps by Launch Tech Co., Ltd: https://appshunter.io/developer/447568418

## Related topics

[launch x431](https://appshunter.io/ios/topics/launch-x431) · [x431](https://appshunter.io/ios/topics/x431)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-28.*