Comparison

Engine Link vs UMR Mobility

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

UMR Mobility

Read full description

UMR Mobility GmbH as an independent company customers in the areas of personnel management, personal leasing and payrolling. For all our partners in the automotive industry, UMR Mobility GmbH offers preparation of vehicles (cars, trucks, buses, trams and trains) on a work contract basis

Screenshots

Engine Link4 screens
UMR Mobility3 screens

Verdict

The call

The clearest difference is price: UMR Mobility at Free against Engine Link's $5.99. Engine Link's advantage is update cadence (every 2 months vs every 19 months). On in-app purchases, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

UMR Mobility is free to download; Engine Link costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Engine Link ships an update every 2 months, UMR Mobility every 19 months. The most recent releases landed on October 12, 2026 and May 16, 2026 respectively.

Scorecard2 real differences · 8 level
Engine Link versus UMR Mobility: the parameters behind the verdict, then further details
ParameterEngine LinkUMR Mobility
Price$5.99Free — better
Rating2.9 (62 ratings) — better—
Positive reviews38.2% of reviews—
Number of ratings62 — better—
Update frequencyEvery 2 months — betterEvery 19 months
AdsNo—
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.011.0 — better
Further details — not scored
Size10 MB33 MB
Age rating4+4+
DeveloperK SOLUTION LLCFlorent Ahmedi

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

UMR Mobility

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Engine Link

No in-app purchases

None

UMR Mobility

No in-app purchases

Questions

Is Engine Link free?
Engine Link costs $5.99, with no in-app purchases.
Is UMR Mobility free?
UMR Mobility is free to download, with no in-app purchases.
Which is updated more often, Engine Link or UMR Mobility?
Engine Link ships an update every 2 months, and UMR Mobility every 19 months. Most recently, Engine Link was updated on October 12, 2026 and UMR Mobility on May 16, 2026.

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