Comparison

iOBD2 vs OBD2 Scanner | OBD Auto Doctor

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

Head to head
About

iOBD2

Transform your iPhone or iPad into a powerful vehicle diagnostic tool. Read engine data, check for issues, and monitor real-time performance metrics like fuel consumption and acceleration. Customize your dashboard to display only the information you care about.

Highlights
  • Read and clear diagnostic trouble codes (DTCs)
  • Access live engine data
  • View freeze frame data
  • Monitor readiness test status
  • Read vehicle information (VIN, CALID, CVN)
  • Perform O2 sensor and EVAP system tests
  • Customize real-time dashboards
Features
Read full description

iOBD2 is an app for your car. It makes your iPhone/iPod touch/iPad into a cool vehicle diagnostic tool to read your engine data. 1. When you are driving and MIL is on, you can check your car and know whether you can go on or not. 2. When there are troubles with your car, you can check it yourself and know what the problems are, and then ask for help by twitter or facebook from others. 3. You can know real time information such as fuel consumption, torque, acceleration, etc from iOBD2 on your iPhone/iPod touch/iPad. 4. iOBD2 can customized your gauge and after select the data that you are interested in, it will show you only the data which you concern. 5. You can share the record what you get from the car by iOBD2 on twitter and facebook. !!Attention: 1.Please make sure that your vehicle is with OBD-II/EOBD compliance before purchasing! 2.You can upgrade your general iOBD2 to iOBD2-BMW or iOBD2-VAG when you only have iOBD2 hardware , and you only need to pay $80.00 for iOBD2-BMW or $30.00 for iOBD2-VAG without paying extra money for hardware. Buy multiple gauges iOBD2 with scream and best price! (Note: Not all OBD-II compliant vehicles support all these parameters) DISCLAIMER: After buy our iOBD2 hardware interface, and download iOBD2 App, then your iPhone/iPod touch/iPad can communicate with the vehicle. You can buy it on our ebay shop or amazon shop or contact our sales. Function: 1. Diagnostic [Read DTC]: Read the current DTC that engine has stored, and show DTC info. [Clear DTC]: Clear all the current DTC. [Live data]: Read all the running parameters that related to the ECU. [Freeze frame data]: When OBD system sets the DTC, it will record the system running parameters related to the malfunction at the same time. And these parameters are called freeze frame data. [Readiness test]: Readiness reflects the status that all the valid diagnostic functions. [Read vehicle info]: Read vehicle info such as Vehicle Identification Number (VIN), Calibration IDs (CALID) and Calibration Verification Number (CVN). [O2 Sensor test]: It allows access to the on-board oxygen sensor monitoring test results. The same information may be obtained by the use of [Mode 6 test]. [Mode 6 test]: It allows access to the results for on-board diagnostic monitoring tests of specific components/systems that are not continuously monitored. [EVAP System Test]: The purpose of this service is to enable the external test equipment to control the operation of an on-board system, test or component. 2. My dashboard [Idle mode]: engine rotational speed, water temperature, battery voltage, mass air flow, instant fuel consumption (static), ignition timing, ever wished you had your own customizable gauges, showing only the data you were interested in. [Cruise mode]: vehicle speed, vehicle travel time, vehicle travel average speed, continuous running mileage, avg. fuel consumption., ever wished you had your own customizable gauges, showing only the data you were interested in. [Sport mode]: engine rotational speed, vehicle speed, water temperature, ins. fuel consumption(dynamic), acceleration speed, ever wished you had your own customizable gauges, showing only the data you were interested in. [Performance mode]: engine rotational speed, vehicle speed, power, torque, horsepower, ever wished you had your own customizable gauges, showing only the data you were interested in. 3. Performance test [Accelerate/Decelerate test]: Test acceleration / deceleration process time and distance. [0 to 400m acceleration test]: Test spends time from 0 to 400 meters. 4. Settings You can set units, alarms, coefficient and also customized the dashboard here. 5. History After record the history data, you can share the record what you get from the car by iOBD2 on Twitter and facebook. Package Hardware: iOBD2 unit Software: iOBD2 client software on app store Visit the iOBD2 product page for more info: www.iobd2.com

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

Screenshots

iOBD24 screens
OBD2 Scanner | OBD Auto Doctor4 screens

Verdict

The call

The clearest difference is rating: OBD2 Scanner | OBD Auto Doctor at 4.4 against iOBD2's 2.9. OBD2 Scanner | OBD Auto Doctor also leads on ratings volume (6.2K vs 85). iOBD2's advantage is in-app purchases (none vs 9) and iOS requirement (6.0 vs 17.0). On price, review sentiment, update cadence and ads 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. iOBD2 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

OBD2 Scanner | OBD Auto Doctor holds the better App Store score, 4.4 against 2.9. That said, the two scores are not equally well evidenced: OBD2 Scanner | OBD Auto Doctor has 6.2K ratings behind it against 85, so its average is the more settled of the two. Written reviews point the same way: 23% of iOBD2's written reviews are positive against 30% of OBD2 Scanner | OBD Auto Doctor's.

UpkeepUpdate frequency

iOBD2 ships an update every 5 weeks, OBD2 Scanner | OBD Auto Doctor every 3 weeks. The most recent releases landed on October 23, 2026 and November 1, 2026 respectively.

Scorecard4 real differences · 6 level
iOBD2 versus OBD2 Scanner | OBD Auto Doctor: the parameters behind the verdict, then further details
ParameteriOBD2OBD2 Scanner | OBD Auto Doctor
PriceFreeFree
Rating2.9 (85 ratings)4.4 (6.2K ratings) — better
Positive reviews23.4% of reviews30.3% of reviews — better
Number of ratings856.2K — better
Update frequencyEvery 5 weeksEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS6.0 — better17.0
Further details — not scored
Size90 MB19 MB
Age rating4+4+
Developer翔宇 金Creosys

Customer experience

iOBD2

All ratings84 ratings
Positive40.5%
Neutral10.7%
Negative48.8%
Written reviews197 reviews
Positive23.4%
Neutral9.1%
Negative67.5%

OBD2 Scanner | OBD Auto Doctor

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

User reviews

iOBD2

From 85 App Store ratings

What we love

  • 🚀 Works great
  • 👍 Wonderful app
  • 🚀 Excellent tool
  • 👍 Good product
  • 🚀 Awesome free app

Room to improve

  • 🐛 Doesn't work
  • 🐛 Crashes frequently
  • 🐛 Connection issues
  • 🐛 Unreliable
  • 🐛 Useless

OBD2 Scanner | OBD Auto Doctor

From 6.2K App Store ratings

What we love

  • 🚀 Works great
  • 👍 Easy to use
  • 🚀 Accurate diagnostics
  • 🚀 Extensive adapter support
  • 👍 Helpful for DIY mechanics

Room to improve

  • 🔒 Requires subscription for full functionality
  • 🐛 Connection issues
  • 🐛 Inconsistent performance
  • 🐛 Doesn't work with all vehicles
  • 💰 Expensive subscription

Bugs and requests

iOBD2

Reported bugs

4 issues
  • Crashes when checking DTCs
  • Fails to connect to Bluetooth/WiFi adapters
  • Incorrect sensor readings
  • Compatibility issues with newer vehicles

Requested features

5 requests
  • Update for newer iOS versions
  • More frequent updates
  • Support for more vehicle makes/models
  • Customizable dashboards
  • Live data for more sensors

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

In-app purchases

None

iOBD2

No 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

Questions

Is iOBD2 free?
iOBD2 is free to download, with no in-app purchases.
Is OBD2 Scanner | OBD Auto Doctor free?
OBD2 Scanner | OBD Auto Doctor is free to download, with in-app purchases available.
Which has better reviews, iOBD2 or OBD2 Scanner | OBD Auto Doctor?
OBD2 Scanner | OBD Auto Doctor is rated higher. iOBD2 averages 2.9 out of 5 from 85 ratings, while OBD2 Scanner | OBD Auto Doctor averages 4.4 from 6.2K ratings.
Do iOBD2 or OBD2 Scanner | OBD Auto Doctor have ads?
Neither iOBD2 nor OBD2 Scanner | OBD Auto Doctor shows ads.
Which is updated more often, iOBD2 or OBD2 Scanner | OBD Auto Doctor?
iOBD2 ships an update every 5 weeks, and OBD2 Scanner | OBD Auto Doctor every 3 weeks. Most recently, iOBD2 was updated on October 23, 2026 and OBD2 Scanner | OBD Auto Doctor on November 1, 2026.

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