Comparison

Engine Link vs Motion Log Plus

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

Motion Log Plus

This tool captures and visualizes motion data from your iOS device, including orientation, attitude, and acceleration. You can preview recordings in 3D and export log files for further analysis.

Highlights
  • Capture device orientation, attitude, and acceleration
  • Preview motion data in 3D
  • Rename and delete log files
  • Export motion log files
  • Turn off screen while recording
Features
Read full description

Motion Log is a device sensor logging tool that empowers you to capture the motion of your iOS Devices. It records various data points, including device attitude, orientation, and applied force. After recording, you can conveniently preview the motion data. Embark on a journey of motion exploration with Motion Log, a cutting-edge device sensor logging tool designed for iOS devices. Whether you're tracking the subtle nuances of device orientation, analyzing acceleration patterns, or documenting the dynamic forces at play, Motion Log offers unparalleled insight into the motion dynamics of your device. With its intuitive interface and robust feature set, Motion Log empowers users to record, visualize, and analyze motion data with ease. From everyday activities to adventurous endeavors, Motion Log provides a comprehensive toolkit for understanding and harnessing the power of motion. Experience motion logging like never before and unlock a world of possibilities with Motion Log. Features: • Capture motion data of your iOS Devices, including: - Device orientation to North. - Device Attitude: Pitch, Roll, and Yaw. - Device Acceleration in X, Y, and Z directions. - Time and Date of recording start. • Option to turn off the screen while recording. • Rename or delete motion log files. • Preview recorded motion data in 3D. • View 3D device preview at normal speed, 2X speed, or 0.5X speed. • Toggle data preview On or Off. 3D Preview: • Display device orientation in 3D space. • Represent device acceleration with 3D arrows (X - Red, Y - Green, Z - Blue). • Arrow size adjusts based on acceleration magnitude. Motion Log Files: • Access motion log files in the [Files] app under [Motion Log] Folder. • Open motion log files using a normal text editor. • Data array includes compass (0-360 degrees), attitude (Pitch, Roll, and Yaw in radians), and device acceleration (X, Y, Z in G - Gravity). • Recorded with a 0.05 sec interval. • Share motion log files via Airdrop, Messages, or Mail. • Easily load shared motion log files by placing them into [Motion Log] Folder via [Files] app. Usage: • Record walking or running motions. • Capture desk vibrations or other movements. • Analyze G force while riding roller coasters. • Assess road conditions or G force while driving. • Monitor attitude or G force while biking or cycling. • Explore endless possibilities based on your imagination. Thank you for your support, and feel free to visit nitrio.com for more iOS device apps.

Screenshots

Engine Link4 screens
Motion Log Plus4 screens

Verdict

The call

The clearest difference is rating: Engine Link at 2.9 against Motion Log Plus's 1.0. Engine Link also leads on update cadence (every 2 months vs every 22 months) and ratings volume (62 vs 1). Motion Log Plus's advantage is price ($2.99 vs $5.99). On ads, 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

Engine Link costs $5.99 and Motion Log Plus $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Engine Link holds the better App Store score, 2.9 against 1.0. That said, the two scores are not equally well evidenced: Engine Link has 62 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Engine Link ships an update every 2 months, Motion Log Plus every 22 months. The most recent releases landed on October 26, 2026 and October 22, 2026 respectively.

Scorecard5 real differences · 5 level
Engine Link versus Motion Log Plus: the parameters behind the verdict, then further details
ParameterEngine LinkMotion Log Plus
Price$5.99$2.99 — better
Rating2.9 (62 ratings) — better1.0 (1 ratings)
Positive reviews38.2% of reviews—
Number of ratings62 — better1
Update frequencyEvery 2 months — betterEvery 22 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.0 — better13.1
Further details — not scored
Size10 MB2 MB
Age rating4+4+
DeveloperK SOLUTION LLCHeng Jia Liang

Customer experience

Engine Link

All ratings62 ratings
Positive45.2%
Neutral6.5%
Negative48.4%
Written reviews204 reviews
Positive38.2%
Neutral9.8%
Negative52.0%

Motion Log Plus

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

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

Motion Log Plus

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Engine Link

No in-app purchases

None

Motion Log Plus

No in-app purchases

Questions

Is Engine Link free?
Engine Link costs $5.99, with no in-app purchases.
Is Motion Log Plus free?
Motion Log Plus costs $2.99, with no in-app purchases.
Which has better reviews, Engine Link or Motion Log Plus?
Engine Link is rated higher. Engine Link averages 2.9 out of 5 from 62 ratings, while Motion Log Plus averages 1.0 from 1 ratings.
Do Engine Link or Motion Log Plus have ads?
Neither Engine Link nor Motion Log Plus shows ads.
Which is updated more often, Engine Link or Motion Log Plus?
Engine Link ships an update every 2 months, and Motion Log Plus every 22 months. Most recently, Engine Link was updated on October 26, 2026 and Motion Log Plus on October 22, 2026.

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