Comparison

OBD2 Scanner | OBD Auto Doctor vs mi3

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

mi3

This application provides detailed insights into BMW electric vehicles, offering real-time data monitoring for battery health, charging status, and more. It functions as a pre-purchase inspection tool and aids in regular car usage by displaying various vehicle parameters.

Highlights
  • Real-time data monitoring
  • Battery State of Charge/Health
  • Charging details and charts
  • Cell temperature and voltage display
  • OBD adapter support (BT, WiFi, ENET)
  • Integration with A Better Routeplanner
Features
Read full description

mi3 as easy to use diagnostic application shows insights about BMW electric vehicle which can be useful as pre-purchase inspection tool, as well as during regular car usage. Example of useful features: - Realtime monitoring of different data sources, not always exposed by on-board system - Current State of Charge/SoC and State of Health/SoH of EV High Voltage battery - Charging details in kW, including charts view. Chart data is available in text format locally under Files/BMW EV/charts/ - Different other details, such as Cells temperature and voltages, forecasted range, in the form of min...max - REX details of usage, if available - Different OBD adapters are supported via BT/Bluetooth, WiFi and ENET. - Application can share details with A Better Routeplanner (ABRP) if needed and supports different BMW cars: BMW i3/s , Mini Cooper SE and more to come. Requires OBD adapter to work with and to be connected to the car.

Screenshots

OBD2 Scanner | OBD Auto Doctor4 screens
mi33 screens

Verdict

The call

OBD2 Scanner | OBD Auto Doctor and mi3 both sit at 4.4 stars, but that hides the real split: 100% of mi3's written reviews are positive against 30% of OBD2 Scanner | OBD Auto Doctor's. mi3 also leads on in-app purchases (none vs 9) and iOS requirement (13.0 vs 17.0). OBD2 Scanner | OBD Auto Doctor's advantage is ratings volume (6.2K vs 16) and update cadence (every 3 weeks vs every 4 months). On price, rating, 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. mi3 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.4 for OBD2 Scanner | OBD Auto Doctor against 4.4 for mi3. That said, the two scores are not equally well evidenced: OBD2 Scanner | OBD Auto Doctor has 6.2K ratings behind it against 16, so its average is the more settled of the two. Written reviews are what separate them: 30% of OBD2 Scanner | OBD Auto Doctor's written reviews are positive against 100% of mi3's.

UpkeepUpdate frequency

OBD2 Scanner | OBD Auto Doctor ships an update every 3 weeks, mi3 every 4 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard6 real differences · 4 level
OBD2 Scanner | OBD Auto Doctor versus mi3: the parameters behind the verdict, then further details
ParameterOBD2 Scanner | OBD Auto Doctormi3
PriceFreeFree
Rating4.4 (6.2K ratings)4.4 (16 ratings) — better
Positive reviews30.3% of reviews100.0% of reviews — better
Number of ratings6.2K — better16
Update frequencyEvery 3 weeks — betterEvery 4 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.013.0 — better
Further details — not scored
Size19 MB5 MB
Age rating4+4+
DeveloperCreosysMax Dmitrichenko

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%

mi3

All ratings14 ratings
Positive85.7%
Neutral7.1%
Negative7.1%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

mi3

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

mi3

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 mi3 free?
mi3 is free to download, with no in-app purchases.
Which has better reviews, OBD2 Scanner | OBD Auto Doctor or mi3?
mi3 is rated higher. OBD2 Scanner | OBD Auto Doctor averages 4.4 out of 5 from 6.2K ratings, while mi3 averages 4.4 from 16 ratings.
Do OBD2 Scanner | OBD Auto Doctor or mi3 have ads?
Neither OBD2 Scanner | OBD Auto Doctor nor mi3 shows ads.
Which is updated more often, OBD2 Scanner | OBD Auto Doctor or mi3?
OBD2 Scanner | OBD Auto Doctor ships an update every 3 weeks, and mi3 every 4 months. Most recently, OBD2 Scanner | OBD Auto Doctor was updated on November 1, 2026 and mi3 on November 3, 2026.

Other comparisons