Comparison

OBD2 Scanner | OBD Auto Doctor vs Live Spec

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

Live Spec

Transform your phone into a real-time car performance tracker and diagnostic tool. Monitor vital sensors, troubleshoot engine codes, and track fuel economy to save money. Features include customizable gauges, graphing, and race track data analysis.

Highlights
  • Real-time sensor tracking
  • Read and clear trouble codes
  • Fuel economy tracking
  • Customizable gauges and graphs
  • Race track data analysis
  • Speed limit warnings
  • HUD mode for night driving
Features
Read full description

Track performance of your car in real time by virtual gauges and graphs. Troubleshoot malfunctions by accessing the on board ECU. Know what is wrong with your car before taking it to the mechanic. Track fuel economy and save money on gas. These are just some of the features Live spec by Black Market Performance has to offer. Live spec transforms your phone/tablet into an all in one performance tracking and troubleshooting tool for your car. Live spec features: • Customizable gauges track up to 100 sensors in real time including fuel economy, G-force, gear display and battery voltage. • Read and Clear trouble codes and reset MIL (service engine light). • Metric and Imperial measures. • Real-time user-defined sensor plotting. Graph up to 4 sensors at the same time on interactive graph that can be scrolled, paused and selected. • Gauge list feature can track every sensor at the same time. • Freeze frame support (mode 02). • Instant horsepower, mpg/kpl fuel economy, boost pressure and G force tracking. • Read Vehicle VIN number, calibration ID and more (mode 09). • Speed limit warning: Get notified when driving over speed limit. • High oil/coolant temperature warning gives you instant notification when your car is running too hot. • HUD mode for dashboard view : Heads up display for driving at night. • Emissions test readiness. • Multiple ECU support. • Two themes to choose from. • Console mode for entering OBD commands. • landscape mode for all views. • Additional Cummins PIDs. • Extended PID support: Enhanced PID support for specific manufacturers (mode 22). • Fuel Economy: - Instant and average fuel economy tracking for 0-5 min, 0-30 min and 0-2 hr intervals and a detailed summary. - Long term tracking with six different intervals. (1 week, 2 weeks, 4 weeks, 13 weeks, 26 and 52 weeks). - 4 different units of measure: MPG,KPL (Km/L), L/100 Km, Miles per imperial gallon. - Interactive graph of long term data that can be cropped and scrolled through. - Export fuel history to CSV file (spreadsheets). - Other statistics: Distance travelled, average speed, money spent, CO2 produced and fuel consumed. - 3 methods of calculation available. For non MAF vehicles. • Race track package: - Real time lap data, gap delay time and position in race track using high frequency GPS tracking. - Comprehensive summary of race with lap times, speed fluctuations on track and more. - Get drag racing times (0-60 mph, 0-100 mph, 1/4 mile 1/8 mile etc.) - Load and save unlimited number of tracks onto device. - Crucial racing data including real time horsepower, g-force and a detailed driving summary. Share your results with friends. - Transmission gear information and optional shifting assistant which notifies optimal moment of shifting gears. - Customizable view that toggles between speed/rpm gauge, real time track positioning and G-sensor feedback. - Record your race in HD with gauge and track overlays. (dash cam add-on required) • Dashcam: Record smooth HD video with overlaying gauges (speed,rpm, etc), time, location (GPS coordinates) and G-force sensor in four different resolutions. You can record from 90 sensors and up to 5 gauges. • Sensor logger: You can record up to four sensors at the same time with 5 different refresh rates. Save graph sensor data to CSV file and export to PC/MAC for further analysis. Send real time data to TCP socket (IP Address) over network. - For fuel economy feature your vehicle must be equipped with MAF sensor. *** NOTE: A BMP Live spec OBD adapter or OBD2 Bluetooth LE adapter is required for this app to work. Support: livespectech@gmail.com Black Market Performance

Screenshots

OBD2 Scanner | OBD Auto Doctor4 screens
Live Spec4 screens

Verdict

The call

The clearest difference is price: OBD2 Scanner | OBD Auto Doctor at Free against Live Spec's $9.99. OBD2 Scanner | OBD Auto Doctor also leads on rating (4.4 vs 3.9) and review sentiment (30% vs 0%). Live Spec's advantage is in-app purchases (none vs 9) and iOS requirement (10.0 vs 17.0). 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

OBD2 Scanner | OBD Auto Doctor is free to download; Live Spec costs $9.99 up front. OBD2 Scanner | OBD Auto Doctor sells 9 in-app purchases, starting at $4.99 per month. Live Spec 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 3.9. That said, the two scores are not equally well evidenced: OBD2 Scanner | OBD Auto Doctor has 6.2K ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 30% of OBD2 Scanner | OBD Auto Doctor's written reviews are positive against 0% of Live Spec's.

UpkeepUpdate frequency

OBD2 Scanner | OBD Auto Doctor ships an update every 4 weeks, Live Spec monthly. The most recent releases landed on September 26, 2026 and August 26, 2026 respectively.

Scorecard7 real differences · 3 level
OBD2 Scanner | OBD Auto Doctor versus Live Spec: the parameters behind the verdict, then further details
ParameterOBD2 Scanner | OBD Auto DoctorLive Spec
PriceFree — better$9.99
Rating4.4 (6.2K ratings) — better3.9 (8 ratings)
Positive reviews30.3% of reviews — better0.0% of reviews
Number of ratings6.2K — better8
Update frequencyEvery 4 weeks — betterMonthly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.010.0 — better
Further details — not scored
Size19 MB10 MB
Age rating4+4+
DeveloperCreosysAlphabit Software Inc.

Customer experience

OBD2 Scanner | OBD Auto Doctor

All ratings6,181 ratings
Positive84.4%
Neutral4.1%
Negative11.4%
Written reviews575 reviews
Positive30.3%
Neutral8.3%
Negative61.4%

Live Spec

All ratings8 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews2 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

Live Spec

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

Live Spec

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 Live Spec free?
Live Spec costs $9.99, with no in-app purchases.
Which has better reviews, OBD2 Scanner | OBD Auto Doctor or Live Spec?
OBD2 Scanner | OBD Auto Doctor is rated higher. OBD2 Scanner | OBD Auto Doctor averages 4.4 out of 5 from 6.2K ratings, while Live Spec averages 3.9 from 8 ratings.
Do OBD2 Scanner | OBD Auto Doctor or Live Spec have ads?
Neither OBD2 Scanner | OBD Auto Doctor nor Live Spec shows ads.
Which is updated more often, OBD2 Scanner | OBD Auto Doctor or Live Spec?
OBD2 Scanner | OBD Auto Doctor ships an update every 4 weeks, and Live Spec monthly. Most recently, OBD2 Scanner | OBD Auto Doctor was updated on September 26, 2026 and Live Spec on August 26, 2026.

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