Comparison

Engine Link vs MyVoltControl

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

MyVoltControl

Enhance your Chevrolet Volt or Bolt experience with advanced control features. This app allows you to manage vehicle modes, monitor performance, and access diagnostic information, requiring an OBD adapter for full functionality.

Highlights
  • Vehicle information pages
  • Simulated Hold mode for ICE management
  • Engine run and off control
  • Reset lifetime fuel economy
  • EV and ICE travel distance calculation
  • Diagnostic trouble code access
Read full description

MyVoltControl is designed specifically for the Chevrolet Volt (and related models), and the Chevrolet Bolt. ("Related models" include the Cadillac ELR, Cadillac CT6, Opel Ampera, Holden Volt, Opel Ampera-e.) MyVoltControl requires the use of an OBD adapter that complies with the ELM327 specification (most do). You can use either: - an OBDLink MX+ OBD adapter (preferred) - an OBDLink MX-WiFi OBD adapter - a Bluetooth-Low-Energy (aka Bluetooth 4) OBD adapter. (Classic bluetooth adapters are not supported by iOS.) - a generic WiFi OBD adapter will work in most cases (but is not recommended). If you need to buy an adapter, or to see a list of some that aren't ELM327 compatible, refer to the information in our FAQ page at http://www.CraftinDeApps.com/FAQ#MVC These adapters plug into the OBD-II port under the left side of your dash. The App itself is free. Use of the functions described below requires one-time in-app purchases to enable each one that you want to use. MyVoltControl consolidates four functions, long available for other phones, and makes them available for the iPhone and iPad. In addition, the last one is unique to this app. These are known as: -->> MyVoltHold -->> MyVoltLifetime -->> MyVoltDiag -->> MyVoltAfterblow -->> MyVolt12v -->> The Volt Hold function does four things. - First, at the top, it has several "information pages" that you can switch between to see information about your car. These are shown in the photos above. - Second, it allows you to turn on a "Hold" mode which approximates the Hold mode built into the car beginning with the 2013 model. This Hold mode turns on the internal combustion engine (ICE) as needed to try to maintain a State of Charge value that is close to the charge that was present when you turned the mode on. So why, you may ask, would I want that function on a newer car. Very simple really. Since Sport mode and Hold mode are mutually exclusive, this function allows you to use the car Mode button to engage Sport mode, while using the Hold function in this App to achieve Hold mode at the same time! Hold mode can also be automatically engaged based on several factors. - Next, it allows you to ask the car to run the internal combustion engine. You can use this to get heat from the engine on a cold morning, or to manually simulate your own Hold mode if you prefer. - Finally, you can also use this function to force the ICE off, which you might want to do if the ICE is running due to low temperature (done for driver comfort). The Volt Hold function is not available (and would serve no purpose) on the Chevrolet Bolt models. -->> The Volt Lifetime function allows you to reset the lifetime fuel economy value ("Lifetime MPG" or "Lifetime L/100km") value for your car. You will find this useful if you've purchased a car which has recorded the previous owner's fuel economy results. You can also use this to calculate the distance travelled in both EV mode and on the ICE by entering the Lifetime Economy number shown on your dash. The Volt Lifetime function is not available (and would serve no purpose) on the Chevrolet Bolt models. -->> The Volt Diag function allows you to run some tests on your high-voltage (traction) battery. -->> The Volt Afterblow function allows you to control a system that GM added to your car to dry out the A/C vents. This system is OFF by default and the Volt Afterblow function allows you to turn it on (or back off). This app function is not available for 2013 model year cars. - You can use the Volt Afterblow feature ONLY if you are using an OBD adapter which supports the SWCAN (aka GMLAN) bus. It must also support the "ST" command set (in addition to the common "AT" command set). Very few adapters offer this support. The known to be good and recommended adapters for this are the OBDLink MX+ or the OBDLink MX-Wifi adapters. -->> The Volt 12v function displays graphs showing the values of voltage and current on your 12 volt battery.

Screenshots

Engine Link4 screens
MyVoltControl4 screens

Verdict

The call

The clearest difference is price: MyVoltControl at Free against Engine Link's $5.99. MyVoltControl also leads on rating (4.3 vs 2.9) and review sentiment (50% vs 38%). Engine Link's advantage is in-app purchases (none vs 5) and ratings volume (62 vs 16). On update cadence, ads 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

CostPrice · In-app purchases · Ads · Monetization

MyVoltControl is free to download; Engine Link costs $5.99 up front. MyVoltControl sells 5 one-off in-app purchases. Engine Link asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

MyVoltControl holds the better App Store score, 4.3 against 2.9. Both are backed by a comparable volume of ratings — 62 and 16 respectively. Written reviews point the same way: 38% of Engine Link's written reviews are positive against 50% of MyVoltControl's.

UpkeepUpdate frequency

Engine Link ships an update every 2 months, MyVoltControl every 5 weeks. Both last shipped on September 25, 2026.

Scorecard7 real differences · 3 level
Engine Link versus MyVoltControl: the parameters behind the verdict, then further details
ParameterEngine LinkMyVoltControl
Price$5.99Free — better
Rating2.9 (62 ratings)4.3 (16 ratings) — better
Positive reviews38.2% of reviews50.0% of reviews — better
Number of ratings62 — better16
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.0 — better15.0
Further details — not scored
Size10 MB20 MB
Age rating4+4+
DeveloperK SOLUTION LLCCraftin De Apps LLC

Customer experience

Engine Link

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

MyVoltControl

All ratings16 ratings
Positive75.0%
Neutral12.5%
Negative12.5%
Written reviews14 reviews
Positive50.0%
Neutral7.1%
Negative42.9%

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

MyVoltControl

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Engine Link

No in-app purchases

5 purchases

MyVoltControl

One-time5
  • Volt Hold Function$0.99
  • Volt Lifetime Function$1.99
  • Volt Diag Function$1.99
Show 2 more
  • Volt 12v Function.$1.99
  • Volt Afterblow Function$2.99

Questions

Is Engine Link free?
Engine Link costs $5.99, with no in-app purchases.
Is MyVoltControl free?
MyVoltControl is free to download, with in-app purchases available.
Which has better reviews, Engine Link or MyVoltControl?
MyVoltControl is rated higher. Engine Link averages 2.9 out of 5 from 62 ratings, while MyVoltControl averages 4.3 from 16 ratings.
Do Engine Link or MyVoltControl have ads?
Neither Engine Link nor MyVoltControl shows ads.
Which is updated more often, Engine Link or MyVoltControl?
Engine Link ships an update every 2 months, and MyVoltControl every 5 weeks. Most recently, Engine Link was updated on September 25, 2026 and MyVoltControl on September 25, 2026.

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