# CarDiag — A Mechanic In Your Pocket

> Car diagnostic tool to identify issues, reset check engine light, and manage maintenance. (iPhone/iPad app by HI GROUP.)

- Source: https://appshunter.io/ios/app/cardiag/id1525347987 (this page in markdown: same URL + `.md`)
- Developer: [HI GROUP](https://appshunter.io/developer/1609861239)
- Category: Utilities, Reference
- Price: Free
- Rating: 1.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 11.0 · 18 MB
- Languages: American English, French (France)
- Released: 2020-08-04
- Data updated: 2026-07-30
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/cardiag/id1525347987/reviews.md

## What is CarDiag?

CarDiag : A trusted mechanic in your pocket

Diagnose your car, find breakdowns and turn off the check engine light !

CarDiag : Your Easy Car Diagnostic - OBD2

Thanks to its connected device and its free and intuitive mobile application, CarDiag allows motorists to diagnose their vehicle easily, independently and at a lower cost (breakdowns, wear of components and pollution).

The "CarDiag" application supports motorists from "A" to "Z" in the diagnostic, maintenance and repair of their vehicle independently and cheaply : since the doubt of a problem, the identification of the fault, a diagnostic in simple and easy-to-understand terms and a pollution score, Do-it-yourself auto repairs, tips to buy parts as well as a cost estimation at the nearest mechanic. It also provide a digital maintenance book.


Features :
- Automatic Diagnostic : Equipped with an OBD2 bluetooth device (easy to get and available for less than 10$), CarDiag provides a complete list of your car problems in simple and easy-to-understand terms.
- Manual Diagnostic : Cardiag provides assistance for a direct diagnostic by the user (visual defects, noise, smells, etc.)
- Reset the Check Engine Light (MIL) : The check engine light comes on to indicate a malfunction in the engine or the pollution control system. CarDiag allows you to reset this malfunction indicator lamp.
- Maintenance Book : digitize and store all repairs made by the user or a professional with attached invoices.
- Tutorials for Do-it-yourself Auto Repair, and tips to buy Car Parts
- Car repair cost estimation at the nearest mechanic
- Routine vehicle maintenance : Perform a regular vehicle check-up, pre-vehicle inspection or before buying a car


We have all done the same observation when we take our vehicle to a garage : the mechanic diagnoses possible breakdowns using a dedicated diagnostic tool. This simple diagnostic is billed around 50 dollars, in addition of potential repairs which it is difficult to evaluate the real cost and the necessity. However, sometimes a simple reset of the on-board computer can solve many "electronic problems", a feature available in the "CarDiag" application.


Prerequisites: to use the Cardiag application, you should :
* Have an OBD-II compatible car : OBD-II is compatible with all US vehicle models since 1996, European since 2001 (diesel since 2003), Japanize since 2006.
* Have a CarDiag device (OBD2) : easy to get and available on our website/Amazon...

## Key features

- Automatic OBD2 diagnostics
- Manual fault identification
- Reset check engine light
- Digital maintenance book
- DIY repair tutorials
- Repair cost estimation


## Frequently asked questions about CarDiag

### Does CarDiag have ads?

CarDiag is free to use and does not contain advertisements, allowing for an uninterrupted user experience.

### What cars are compatible with CarDiag?

CarDiag is compatible with OBD-II compliant vehicles, including all US models since 1996, European models since 2001 (diesel since 2003), and Japanese models since 2006.

### What is required to use CarDiag?

To use CarDiag, you need an OBD-II compatible car and a CarDiag OBD2 Bluetooth device, which is readily available.

### How does CarDiag help with car repairs?

CarDiag provides tutorials for DIY auto repairs, tips for buying car parts, and estimations for repair costs at local mechanics.

### Can CarDiag reset the check engine light?

Yes, CarDiag allows users to reset the check engine light (MIL) if it indicates a malfunction in the engine or pollution control system.

### What is the update frequency for CarDiag?

The latest version of CarDiag is 1.20, and it was last updated on February 17, 2023. Updates are released periodically to improve functionality and compatibility.

### What devices does CarDiag support?

CarDiag is available for iPhone and iPod devices, providing diagnostic capabilities on the go.

### What is the user rating for CarDiag?

CarDiag has a rating of 1.0 stars based on 1 rating, indicating a need for user feedback and potential improvements.

## Version history (last 5 releases)

### 1.20 — 2023-02-17

Improve the description (English and French)

### 1.19 — 2022-08-28

Adding more car checks

### 1.18 — 2022-07-21

Fix minor bugs

### 1.17 — 2022-06-16

Make the diagnostic easy

### 1.16 — 2022-05-30

Adding partners
Fix some UI bugs

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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 2026-07-30.*