Comparison

OBD2 Scanner | OBD Auto Doctor vs MODI Mobile Diagnostics

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

Head to head
About

OBD2 Scanner | OBD Auto Doctor

Diagnose your car's engine light issues and monitor real-time performance data. This app allows you to read and clear diagnostic trouble codes, track fuel consumption, and view sensor data. It's a comprehensive tool for understanding your vehicle's health.

Highlights
  • Read and clear OBD2 diagnostic trouble codes (DTC)
  • Reset Check Engine Light
  • Monitor real-time vehicle data and sensor readings
  • Track fuel consumption
  • Read readiness monitor status for emissions testing
  • Initiate service routines
  • Send diagnostic data via email
Read full description

Turn your iPhone into a powerful OBD2 car scanner and diagnose your vehicle yourself. Check why your Check Engine Light is on, read and clear diagnostic trouble codes, monitor live engine data, and check emissions readiness — all from your iPhone or iPad with a compatible OBD2 dongle. CHECK YOUR CHECK ENGINE LIGHT Don't guess what's wrong with your car. OBD Auto Doctor reads diagnostic trouble codes from your vehicle and provides detailed information to help you understand what they mean. • Read diagnostic trouble codes (DTCs) • Clear Check Engine Light codes • View detailed code descriptions • Read freeze-frame data MONITOR YOUR CAR IN REAL TIME See what's happening while your engine is running with live OBD2 data. • Engine RPM and vehicle speed • Coolant temperature • Fuel system and fuel trim data • Throttle position • Intake air and engine load • Oxygen sensor data • And many other vehicle parameters Create your own dashboard and choose exactly which sensors you want to monitor. CHECK EMISSIONS READINESS Preparing for an emissions or vehicle inspection? Check your vehicle's readiness monitors and see whether your car's emissions systems have completed their tests. WORKS WITH OBD2 DONGLES Connect OBD Auto Doctor to your vehicle using a compatible Bluetooth, Wi-Fi or Bluetooth Low Energy (BLE) OBD2 dongle. Compatible dongles include many ELM327-based adapters, OBDLink, Vgate, Linker, Veepeak and other compatible OBD2 interfaces. Please note: An OBD2 dongle is required to connect the app to your vehicle. Dongle compatibility and available features depend on your vehicle. MORE THAN JUST A CODE READER OBD Auto Doctor gives you access to the information your car's onboard diagnostic system makes available. • Read vehicle information • Monitor fuel consumption • View and record live sensor data • Read diagnostic trouble codes • Clear diagnostic trouble codes • Check emissions readiness • View freeze-frame data • Monitor vehicle performance Whether you're trying to understand a Check Engine Light, preparing your car for inspection, monitoring your engine, or simply want to know more about your vehicle, OBD Auto Doctor puts professional-style OBD2 diagnostics in your pocket. Download OBD Auto Doctor and start diagnosing your car today. SUBSCRIPTION OBD Auto Doctor offers optional subscriptions that unlock additional features. Terms of Use: https://www.obdautodoctor.com/terms

About

MODI Mobile Diagnostics

This app provides advanced diagnostic and customization options for vehicles. It allows users to read and clear trouble codes, view live data, and unlock coding features for various car brands. A health report feature helps identify potential issues before trips.

Highlights
  • Vehicle diagnostics
  • Read/clear diagnostic trouble codes
  • Live data display
  • Module scan
  • Coding and customization
  • Health Report
  • Service interval reset
Features
Read full description

MODI is a next-generation mobile diagnostic interface, designed and developed by Abrites. Manufactured by the highest standards in the industry, it has been created with automotive enthusiasts in mind, giving you a vast variety of diagnostic and customization options. MODI allows you to tap into the full potential of your vehicle by unlocking coding functions for your car. Main functionalities: • Vehicle diagnostics • Reading and clearing diagnostic trouble codes • Live data displayed in a graph and table view • Module scan • Coding and customization options • Health Report With MODI, you can read and clear diagnostic trouble codes from your car. A “Check Engine” light popped up on your dashboard and your vehicle is now in emergency mode? Not a problem - with MODI, you can perform diagnostics review the trouble code, clear it, drive your car to the nearby mechanic, or continue your journey! You’ve just collected your car from the service shop and noticed that the service intervals are not reset. With MODI in your glove box, this is not an issue anymore - now you can reset the service intervals on your car all by yourself, quickly and easily. We are officially introducing our newest feature: Health Report. Planning a family trip? With our Health Report feature, you can scan all modules on your vehicle, review the registered trouble codes and understand the state of your car. This will point you to potential problems you may face during your upcoming trip so that you can plan a visit to your mechanic. This feature has the potential to spare you costly roadside assistance and repair bills. With MODI, you are getting much, much more. Coding Features*: BMW • Unlock the “M” logo and change other visual elements on the instrument cluster and HUD • Enable full-screen Apple Carplay • Enable/disable the engine Start-Stop system VAG • Enable needle sweep and lap time on the instrument cluster and HUD • Change the startup screen on the instrument cluster/HUD • Enable/disable side-mirror folding and opening on vehicle lock/unlock • Enable wireless Apple Carplay (if the wired function is supported) Peugeot/Citroen • Configure DRL • Enable/disable side-mirror folding and opening on vehicle lock/unlock *The coding features are available only on supported car brands and models. The MODI hardware is Bluetooth-enabled and works with the designated MODI app, available in the Apple Store. You need less than 3 minutes to install your MODI on your car and start using it. How It Works: 1. Connect MODI to your car using the OBD2 port. 2. Download the MODI app on your phone from the App Store. 3. Open the MODI app, select your car brand and access the features and configurations of your car. No in-app purchases or subscriptions are required while you are using MODI. What does this mean for you? You will no longer have to worry about recurring charges, and you will have access to all features of the app without having to pay extra. This will make it easier for you to use MODI and get the most out of it. Have you ever wanted to unlock the full potential of your car? With MODI, you can do just that!

Screenshots

OBD2 Scanner | OBD Auto Doctor4 screens
MODI Mobile Diagnostics4 screens

Verdict

The call

The clearest difference is in-app purchases: MODI Mobile Diagnostics at none against OBD2 Scanner | OBD Auto Doctor's 9. MODI Mobile Diagnostics also leads on iOS requirement (15.6 vs 17.0). OBD2 Scanner | OBD Auto Doctor's advantage is review sentiment (30% vs 0%). On price, 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

Both are free to download. OBD2 Scanner | OBD Auto Doctor sells 9 in-app purchases, starting at $4.99 per month. MODI Mobile Diagnostics asks for nothing beyond the download.

UpkeepUpdate frequency

OBD2 Scanner | OBD Auto Doctor ships an update every 3 weeks, MODI Mobile Diagnostics monthly. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 6 level
OBD2 Scanner | OBD Auto Doctor versus MODI Mobile Diagnostics: the parameters behind the verdict, then further details
ParameterOBD2 Scanner | OBD Auto DoctorMODI Mobile Diagnostics
PriceFreeFree
Rating4.4 (6.2K ratings) — better—
Positive reviews30.3% of reviews — better0.0% of reviews
Number of ratings6.2K — better—
Update frequencyEvery 3 weeks — betterMonthly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.6 — better
Further details — not scored
Size19 MB68 MB
Age rating4+4+
DeveloperCreosysMODI Abrites Ltd.

Customer experience

OBD2 Scanner | OBD Auto Doctor

All ratings6,206 ratings
Positive84.4%
Neutral4.1%
Negative11.5%
Written reviews577 reviews
Positive30.3%
Neutral8.3%
Negative61.4%

MODI Mobile Diagnostics

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

OBD2 Scanner | OBD Auto Doctor

Reported bugs

4 issues
  • App crashes on launch
  • Fails to detect existing fault codes
  • Subscription issues and inability to cancel
  • Incompatible with certain OBD2 adapters

Requested features

6 requests
  • Add support for more vehicle makes and models
  • Improve Bluetooth/WiFi connectivity
  • Provide more detailed diagnostic information
  • Allow clearing of error codes without subscription
  • Add live data dashboards and graphs
Show 1 more
  • Integrate with vehicle maintenance scheduling

MODI Mobile Diagnostics

Not enough reviews yet to summarise bugs or requests.

In-app purchases

9 purchases

OBD2 Scanner | OBD Auto Doctor

Subscriptions8
  • Monthly (legacy)$4.991 Month
  • Personal, monthly$4.991 Month
  • Premium, monthly$5.991 Month
Show 5 more
  • Professional, monthly$6.991 Month
  • Yearly (legacy)$23.991 Year
  • Personal, yearly$23.991 Year
  • Professional, yearly$29.991 Year
  • Premium, annual3 Days trial$29.991 Year
One-time1
  • OBD Auto Doctor Pro (legacy)$29.99
None

MODI Mobile Diagnostics

No in-app purchases

Questions

Is OBD2 Scanner | OBD Auto Doctor free?
OBD2 Scanner | OBD Auto Doctor is free to download, with in-app purchases available.
Is MODI Mobile Diagnostics free?
MODI Mobile Diagnostics is free to download, with no in-app purchases.
Do OBD2 Scanner | OBD Auto Doctor or MODI Mobile Diagnostics have ads?
Neither OBD2 Scanner | OBD Auto Doctor nor MODI Mobile Diagnostics shows ads.
Which is updated more often, OBD2 Scanner | OBD Auto Doctor or MODI Mobile Diagnostics?
OBD2 Scanner | OBD Auto Doctor ships an update every 3 weeks, and MODI Mobile Diagnostics monthly. Most recently, OBD2 Scanner | OBD Auto Doctor was updated on November 1, 2026 and MODI Mobile Diagnostics on November 3, 2026.

Other comparisons