# Engine Link - OBD II diagnosis — Vehicle monitoring & diagnosis

> OBD II vehicle performance monitor and diagnostic scanner for iPhone. (iPhone/iPad app by K SOLUTION LLC.)

- Source: https://appshunter.io/ios/app/engine-link-obd-ii-diagnosis/id591557194 (this page in markdown: same URL + `.md`)
- Developer: [K SOLUTION LLC](https://appshunter.io/developer/289670447)
- Category: Utilities, Sports
- Price: $5.99
- Rating: 2.90/5 from 62 App Store ratings · 204 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 10 MB
- Languages: American English, Catalan, Czech, Danish, Dutch, Finnish, French (France), German (Germany), Greek, Hebrew and 15 more
- Released: 2013-01-21
- Data updated: 2026-08-25
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/engine-link-obd-ii-diagnosis/id591557194/reviews.md

## What is Engine Link?

EngineLink will turn your iPhone/iPod into vehicle / car performance / diagnostics tool and scanner that uses an OBD II WIFI adapter or a low Energy Bluetooth adapter (LELink, LELink2, Carista, Viecar) to connect to your OBD2 engine management / ECU.

The only iPhone app does custom PID, now supports Torque custom PID file. 

BENEFITS:
* Emission Test.
* See what your car is doing in real-time.
* Read and clear OBD fault codes.
* Display car performance and sensor data.
* Customizable gauges, showing only the data you were interested in
* Top Ranked Car App
* No in-app purchase and No subscription fees!
__________________


FEATURES:
+ Show and reset a DTC / CEL / fault code (current, pending and history) like a scan tool
+ Graph data
+ MPG widget to plot real time fuel efficiency
+ Heads up display / HUD mode for night time driving (mirror the display on your vehicle's windshield)
+ Can read Transmission Temperatures (vehicle dependant)
+ Horsepower/HP & Torque / acceleration 
+ Boost / vacuum gauge 
+ Engine speed / Engine RPM / Engine Load /Coolant / Fuel Tank 
+ Customizable dashboard 
+ Full configurable GUI with user choice of dial gauge, bar gauge, plot gauge, digital gauge, and on-off gauge as display elements
+ Full custom PID support.
+  Formula support. 
+ Preloaded GM and Ford PID libraries
+ Preloaded standard PID library and Prius PID libraries .
+ User can add more libraries within the app or by using iTunes File Sharing
+ Multiple ECU support. Non-CAN, 11-bit CAN, and 29-bit CAN ECU bus types
+ Multiframe data support
+ Background color option
+ Email user log function (access by long pressing custom PID screen) 
+ Multiple PID formula support
+ 0 to 60mph timer and quarter mile timer
__________________

EngineLink supports all OBD-II and EOBD compliant vehicles sold worldwide. If in doubt check with your manufacturer first or look for 'OBD2' on written on a big white label in your engine bay.

The app needs an ELM compatible Bluetooth Low Energy (for iPhone4s and later) or Wi-Fi  adapter to work.

You can check Developer WebSite for Adapter Guide: http://www.outdoor-apps.com/enginelink.html

*** If you have Bluetooth OBD adaptor, please contact support@ksolution.org for instruction before you purchase this app.

Drop us an email for any suggestions/questions you may have at support@ksolution.org. We will answer.

## Key features

- Real-time vehicle monitoring
- Read and clear OBD fault codes
- Customizable gauges and dashboards
- MPG widget and fuel efficiency plotting
- Heads up display (HUD) mode
- Horsepower, torque, and acceleration metrics
- Custom PID support

## What do users think of Engine Link?

Overall sentiment: neutral

**Pros**

- 🚀 Works as expected
- 👍 Flexible and customizable
- 💡 Supports custom PIDs
- 🚀 Reliable connection
- 👍 Good customer support

**Cons**

- 🐛 Doesn't work with all OBD dongles
- 🐛 Compatibility issues with newer iOS versions
- 👎 Outdated and clunky interface
- 👎 Limited functionality for EVs
- 🐛 Connectivity problems

**Commonly reported bugs**

- App crashes on connection
- Fails to read/clear error codes
- Inaccurate sensor readings
- Compatibility issues with certain OBD dongles

**Most requested features**

- Add support for more vehicle types
- Improve user interface and customization options
- Add more PID support, especially for EVs
- Implement language localization
- Improve data logging and export capabilities

## Recent user reviews (10 of 204)

All indexed reviews: https://appshunter.io/ios/app/engine-link-obd-ii-diagnosis/id591557194/reviews.md

### 1/5 — Needs updating

*2025-07-12*

Desperately needs updating, would not connect but my wifi dongle works fine with other elm327 apps. Also needs fixes for dark mode the text does not show in the boxes so you have to type in the inputs blindly.

### 1/5 — BROKEN APP. Do NOT buy!

*2025-01-11*

I think this app is derelict, maybe last updated in 2014. No demo, so you can't see that it doesn't work until you buy the app... Doesn't work at all. Have an OBDLink MX+ adapter. It's compatible with iOS and is a high performance, high speed and thoroughly compatible adapter. This app doesn't detect or connect to it, yet I can slide right over to the free "Car Scanner" app and it snaps right up. It's also got some extremely crusty, landscape UI that hijacks the phone orientation and makes it hard to escape (relocating the "home" swipe gesture). And then I spent the next 20+ minutes fighting through layers of support to get a refund.

Definitely stay away from this abandoned app!

### 1/5 — Caution- don’t waste your money!

*2024-09-30*

This app seems to only connect to a limited number of OBD dongles!
Check the list before you waste your money on this app. 
One star because I can’t submit with zero stars.

### 1/5 — Не работает

*2024-07-27*

Верните деньги, программа вообще не работают

### 3/5 — Wishing more EV tailored support

*2023-09-23*

Would be nice to be able to swap out displays/meters that are ICE car specific  for EV specific

### 1/5 — Extremely substandard and poor

*2022-06-11*

Bought this app from apple store, it launched and did not work as intended. Very much disappointing to find out that even it connects with the OBD gadget but shows no sign of life. Anyhow, I am going ask for refund.

### 5/5 — Works as Expected, Flexible

*2022-03-30*

I use the app for my Kia Soul EV 2016 with the LE Link adapter. Once I found the PIDs for my car online, it was easy to create a .csv file and load it into the app via iTunes (or the Finder for recent versions of MacOS). There is some basic documentation online for the format of the .csv files but any doubts about the correct format are quickly dispelled by looking at the sample files in the app. Customer support via email is great. Good choice of ways to display the values.

### 1/5 — App crashes on iPhone and iPad running on 15.2.1

*2022-01-20*

The app opens but once the phone connects to the LeLink BLE Dongle it shuts down automatically. It just runs for about 2 or three seconds. I use the BT Dongle in VW ID4

### 1/5 — Cash

*2021-10-09, version 7.4*

Не успел скачать уже заплатил лол, ещё и в долг 😂

### 3/5 — Custom interface panels are clunky at best

*2021-07-07*

Ok. It works with LeLink and it works with custom PIDs. I wish for a way to delete the default screens I don’t use (I have an EV) and more screens with smaller blocks for more data on the screen.  I’ve heard there’s a new app on the block for iOS that does what this does.

## Frequently asked questions about Engine Link

### What does Engine Link do?

Engine Link transforms your iPhone into a comprehensive vehicle diagnostics tool. It connects to your car's OBD II system via a compatible adapter to display real-time performance data, read and clear fault codes, and monitor various engine parameters.

### What are the key features of Engine Link?

Key features include real-time sensor data display, the ability to read and reset DTC/CEL/fault codes, customizable dashboards with various gauge types, MPG tracking, a HUD mode for night driving, and support for custom PIDs and formulas.

### Is Engine Link free to use?

Yes, Engine Link is a free application. The description explicitly states 'No in-app purchase and No subscription fees!', indicating that all core functionalities are available without any cost.

### What devices and vehicles are compatible with Engine Link?

The app requires an ELM compatible Bluetooth Low Energy or Wi-Fi adapter and works with all OBD-II and EOBD compliant vehicles sold worldwide. It is compatible with iPhones and iPods, specifically mentioning iPhone 4s and later for Bluetooth LE adapters.

### How can I use Engine Link for emission testing?

Engine Link can assist with emission testing by allowing you to view real-time data and clear fault codes that might be preventing your vehicle from passing an emissions test. It provides insights into your car's performance and potential issues.

## Version history (last 5 releases)

### 9.0 — 2024-11-17

Now you can set custom page number.

### 8.0 — 2023-04-29

Added more PID files.
Code optimization.

### 7.4 — 2020-12-07

Added more PIDs for Honda and Toyota.

### 7.3 — 2020-02-18

Improve vehicle compatibility.

### 7.2 — 2018-05-29

Improve compatibility.

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All apps by K SOLUTION LLC: https://appshunter.io/developer/289670447

## Related topics

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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 2026-08-25.*