Engine Link vs ezOBD
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Engine Link
Transform your iPhone into a powerful vehicle diagnostics tool. Monitor real-time performance, read and clear fault codes, and customize your dashboard with detailed sensor data. Supports emission testing and offers a HUD mode for night driving.
- 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
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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.
ezOBD
Access detailed information about your car's health and performance. Monitor real-time engine parameters, fuel consumption, and diagnostic trouble codes. Features a customizable dashboard and graphing capabilities, with VIN decoding and emission test readiness checks.
- Real-time dashboard display
- Customizable gauges
- Real-time graphing
- Read and clear DTC codes
- Monitor fuel consumption
- VIN decoder
- Emission test readiness
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Get access information from the computer(s) in your car about its health and performance Important features and improvements will be based on feedback from our fast growing community Works with Wi-Fi or Bluetooth BLE (4.0) VIN decoder reads car info without having to type in Context sensitive help system Real-time dashboard display with fully customizable gauges Real-time user defined graphing of multiple signals Supports all standard PIDs Monitor fuel consumption while you drive and save money on gas Generate and email logs and diagnostic/repair reports Real-time engine & vehicle parameters Read and clear DTC engine codes Multiple ECU support Free unlimited updates Ad-free Emission test: make sure if your car will pass or fail an emission test View RPMs, coolant temperature, oxygen sensor readings All the OBD II protocols are supported Very simple to use! You don't even have to select your car model Works with inexpensive Bluetooth BLE or Wi-Fi OBD2 devices In graphs you can send a png file of graph along with the csv file We are working hard to enhance the product and will be releasing frequent updates. If you have feedback or questions, please reach out to us directly at support@ezobd.com
Screenshots
Verdict
The clearest difference is price: ezOBD at Free against Engine Link's $5.99. ezOBD also leads on review sentiment (75% vs 38%) and rating (3.3 vs 2.9). Engine Link's advantage is ratings volume (62 vs 6). On ads, in-app purchases, monetization model and device support 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
ezOBD is free to download; Engine Link costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.
ezOBD holds the better App Store score, 3.3 against 2.9. That said, the two scores are not equally well evidenced: Engine Link has 62 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 38% of Engine Link's written reviews are positive against 75% of ezOBD's.
Engine Link ships an update every 2 months, ezOBD monthly. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.
| Parameter | Engine Link | ezOBD |
|---|---|---|
| Price | $5.99 | Free — better |
| Rating | 2.9 (62 ratings) | 3.3 (6 ratings) — better |
| Positive reviews | 38.2% of reviews | 75.0% of reviews — better |
| Number of ratings | 62 — better | 6 |
| Update frequency | Every 2 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 | 8.1 — better |
| Further details — not scored | ||
| Size | 10 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | K SOLUTION LLC | UP & RUNNING |
Customer experience
Engine Link
ezOBD
Bugs and requests
Engine Link
Reported bugs
4 issues- App crashes on connection
- Fails to read/clear error codes
- Inaccurate sensor readings
- Compatibility issues with certain OBD dongles
Requested features
5 requests- 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
ezOBD
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Engine Link
No in-app purchases
ezOBD
No in-app purchases









