Comparison

BT1 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

BT1

Decode your vehicle's Check Engine Light and check for recalls or service bulletins. Connect a compatible scanner to your device to gain insights into your car's health and avoid unexpected issues.

Highlights
  • Decode Check Engine Light
  • Check for vehicle recalls
  • Check for Special Service Bulletins
  • Connects via Bluetooth or cable scanner
  • Pairs with iPhone, iPod touch, or iPad
Features
Read full description

Calm Your Auto Woes! One in ten vehicles in the US have the Check Engine Light on. Is yours one of them? Was your vehicle one of the 20 million recalled in 2010? Simply connect our BT1 (Bluetooth) or GL1 (cabled) automotive scanner (sold separately) to your vehicle; pair with your iPhone or iPod touch, or iPad; and remove the risks, and surprises, from driving. - Decode the Check Engine Light - Check for vehicle recalls - Check for Special Service Bulletins Like having your own personal mechanic riding next to you!

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

BT14 screens
OBD2 Scanner | OBD Auto Doctor4 screens

Verdict

The call

The clearest difference is rating: OBD2 Scanner | OBD Auto Doctor at 4.4 against BT1's 2.4. OBD2 Scanner | OBD Auto Doctor also leads on ratings volume (6.2K vs 14) and update cadence (every 3 weeks vs every 4 months). BT1's advantage is in-app purchases (none vs 9) and review sentiment (48% vs 30%). On price, 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. BT1 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 2.4. That said, the two scores are not equally well evidenced: OBD2 Scanner | OBD Auto Doctor has 6.2K ratings behind it against 14, so its average is the more settled of the two. Written reviews complicate that: 48% of BT1's written reviews are positive against 30% of OBD2 Scanner | OBD Auto Doctor's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

BT1 ships an update every 4 months, OBD2 Scanner | OBD Auto Doctor every 3 weeks. Both last shipped on November 1, 2026.

Scorecard7 real differences · 3 level
BT1 versus OBD2 Scanner | OBD Auto Doctor: the parameters behind the verdict, then further details
ParameterBT1OBD2 Scanner | OBD Auto Doctor
PriceFreeFree
Rating2.4 (14 ratings)4.4 (6.2K ratings) — better
Positive reviews47.7% of reviews — better30.3% of reviews
Number of ratings146.2K — better
Update frequencyEvery 4 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS10.0 — better17.0
Further details — not scored
Size5 MB19 MB
Age rating4+4+
DeveloperGoPoint Technology, IncCreosys

Customer experience

BT1

All ratings14 ratings
Positive28.6%
Neutral7.1%
Negative64.3%
Written reviews86 reviews
Positive47.7%
Neutral4.7%
Negative47.7%

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

BT1

From 14 App Store ratings

What we love

  • 👍 Easy to use
  • 👍 Works as advertised (sometimes)
  • 👍 Good hardware
  • 👍 Cool technology
  • 👍 Great for basic diagnostics

Room to improve

  • 🐛 Crashes frequently
  • 🐛 Incompatible with newer iOS versions
  • 🐛 Does not detect fault codes accurately
  • 🐛 Limited functionality
  • 🐛 Outdated software

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

BT1

Reported bugs

25 issues
  • App crashes when scanning vehicle
  • App crashes after 30 seconds
  • App not working anymore
  • Cannot select make/model
  • App not updated for newer vehicles
Show 20 more
  • App not compatible with newer IOS versions
  • Initialization failed error
  • Cannot install app on older devices due to iOS requirements
  • Bluetooth device has trouble connecting
  • App crashes upon setup
  • Blank boxes for make/model selection
  • App freezes and glitches
  • App locks up when entering car data
  • App crashes every time
  • Cannot get past create account screen
  • App crashes only once (user reported)
  • Difficult or time-consuming to connect
  • Http error when connected
  • App crashes when connected
  • Doesn't clear check engine light
  • No data stream info
  • App asks for vehicle info and searches recalls
  • Less functions than cabled version
  • Software too basic
  • Does not clear codes or reset trouble lights

Requested features

8 requests
  • Update app for newer iOS versions
  • Add more vehicle makes/models
  • Improve fault code detection
  • Add live data stream
  • Firmware update for Bluetooth device
Show 3 more
  • More detailed vehicle stats
  • Constant data recording
  • More advanced features

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

BT1

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 BT1 free?
BT1 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, BT1 or OBD2 Scanner | OBD Auto Doctor?
OBD2 Scanner | OBD Auto Doctor is rated higher. BT1 averages 2.4 out of 5 from 14 ratings, while OBD2 Scanner | OBD Auto Doctor averages 4.4 from 6.2K ratings.
Do BT1 or OBD2 Scanner | OBD Auto Doctor have ads?
Neither BT1 nor OBD2 Scanner | OBD Auto Doctor shows ads.
Which is updated more often, BT1 or OBD2 Scanner | OBD Auto Doctor?
BT1 ships an update every 4 months, and OBD2 Scanner | OBD Auto Doctor every 3 weeks. Most recently, BT1 was updated on November 1, 2026 and OBD2 Scanner | OBD Auto Doctor on November 1, 2026.

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