eFreeware

Best OBD2 car diagnostic apps for Android

OBD2 diagnostic apps pair with a plug-in adapter to read trouble codes, show live data such as RPM and fuel trims, and clear the check engine light.

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39 apps ranked · How we rank

  1. Number 1: Car Scanner ELM OBD2

    CAR SCANNER LLC

    4.7 out of 5 (363.8K) 10M+ installs

    A free, feature-rich OBD2 scanner for drivers who already own or will buy a compatible ELM327 adapter.

    Download Now: Car Scanner ELM OBD2 Read our review of Car Scanner ELM OBD2

  2. Number 2: Car Scanner OBD2 ELM: Obd Mary

    WyspaTech

    4.6 out of 5 (147.9K) 5M+ installs

    A capable free diagnostic app for drivers who already own an ELM327 adapter and want fault codes, live data and trip logs in one place.

    Download Now: Car Scanner OBD2 ELM: Obd Mary Read our review of Car Scanner OBD2 ELM: Obd Mary
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  1. Number 3: OBD2 Car Scanner - EOBD Facile

    Outils OBD Facile

    4.5 out of 5 (92.8K) 10M+ installs

    A well-established, ad-free diagnostic app for drivers with an ELM327 adapter who want to read fault codes and live engine data themselves.

    Download Now: OBD2 Car Scanner - EOBD Facile Read our review of OBD2 Car Scanner - EOBD Facile

  2. Number 4: RepairSolutions2

    Innova Electronics Corporation

    4.7 out of 5 (28.1K) 1M+ installs

    A free, ad-free diagnostics companion that rewards owners with a compatible OBD2 tool and still helps those without one.

    Download Now: RepairSolutions2 Read our review of RepairSolutions2

  3. Number 5: OBDeleven VAG

    OBDeleven

    4.5 out of 5 (47.2K) 1M+ installs

    A free, ad-free diagnostics and coding app for older K-line VW Group cars with FirstGen devices and Lifetime VAG PRO plans.

    Download Now: OBDeleven VAG Read our review of OBDeleven VAG

  4. Number 6: OBD2 Car Scanner - ELM Torque

    Cards

    4.6 out of 5 (19.8K) 1M+ installs

    A capable diagnostic companion for post-1996 car owners who pair it with a compatible Bluetooth adapter.

    Download Now: OBD2 Car Scanner - ELM Torque Read our review of OBD2 Car Scanner - ELM Torque
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  1. Number 7: ThinkDiag+

    THINKCAR TECH CO., LTD,

    4.3 out of 5 (10.8K) 1M+ installs

    A strong fit for technicians, small shops and hands-on owners who already own or plan to buy compatible Thinkcar hardware.

    Download Now: ThinkDiag+ Read our review of ThinkDiag+

  2. Number 8: OBD Auto Doctor car scanner

    Creosys Ltd

    4.2 out of 5 (29.6K) 1M+ installs

    A deep, practical OBD2 scanner for drivers who want to read, clear and understand their car's fault codes.

    Download Now: OBD Auto Doctor car scanner Read our review of OBD Auto Doctor car scanner

  3. Number 9: Auto Agent

    EZ LYNK

    4.8 out of 5 (3.1K) 100K+ installs

    A free, focused diagnostic app that shines for drivers whose technician is willing to connect remotely.

    Download Now: Auto Agent Read our review of Auto Agent

  4. Number 10: OBDocker - OBD2 Car Scanner

    Motorsure INC.

    4.2 out of 5 (41.5K) 1M+ installs

    A broad, well-organized OBD2 app for owners of supported cars who already have a decent adapter.

    Download Now: OBDocker - OBD2 Car Scanner Read our review of OBDocker - OBD2 Car Scanner

More of the best OBD2 car diagnostic apps

  1. 11 BimmerCode for BMW and MINI SG Software GmbH & Co. KG 4.2 1M+
  2. 12 OBD Fusion (Car Diagnostics) OCTech, LLC 4.7 100K+
  3. 13 Infocar - OBD2 ELM Scanner Infocar Co., Ltd. 3.8 10M+
  4. 14 OBD JScan Clever Software 4.6 100K+
  5. 15 BimmerLink for BMW and MINI SG Software GmbH & Co. KG 4.2 500K+
  6. 16 FIXD OBD2 Scanner FIXD 4.1 1M+
  7. 17 Carista OBD2 Car Scanner Prizmos Ltd. 4.0 1M+
  8. 18 Tor OBD2 Diagnostics & ELM Tor OBD2 Diagnostics 4.0 1M+
  9. 19 MHD Flasher MHD Tuning UG 4.4 100K+
  10. 20 inCarDoc Pro | OBD2 PNN SOFT 4.2 100K+
  11. 21 MECH AI: OBD2 Car Diagnostics MECH.AI LLC 4.1 100K+
  12. 22 Xtool Anyscan XTOOL 4.1 100K+
  13. 23 Carly — OBD2 car scanner Carly Solutions GmbH & Co KG 3.7 1M+
  14. 24 ProTool BimmerGeeks ProTool LLC 4.5 100K+
  15. 25 RepairSolutionsPRO Innova Electronics Corporation 3.8 50K+
  16. 26 Torque Pro (OBD 2 & Car) Ian Hawkins 4.0 1M+
  17. 27 BlueDriver OBD2 Scan Tool Lemur Vehicle Monitors 3.5 1M+
  18. 28 Realtime Charts for Torque Pro Crystal Lake Apps LLC 4.2 10K+
  19. 29 Banks Power Banks Power 4.3 10K+
  20. 30 AutoCodes Tech AutoCodes.com 4.1 10K+
  21. 31 850 OBD-II xiaotec 4.6 5K+
  22. 32 CVTz50 CVTz50 4.2 100K+
  23. 33 Dr. Prius / Dr. Hybrid Pika Tech LLC 3.0 100K+
  24. 34 JB4 Mobile Dmac Mobile Developments, LLC 3.4 50K+
  25. 35 Car Gauge Pro (OBD2 + Enhance) OBD Scantech 3.0 1K+
  26. 36 AlfaOBD AlfaOBD Autodiag 3.3 100K+
  27. 37 OBD2 Scanner: Code Fix Guide AMA Technology 3.2 10K+
  28. 38 Soul EV Spy EVRanger.com 4.1 1K+
  29. 39 HT200 autel2019 2.8 100K+
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About OBD2 car diagnostic apps

They help when a dashboard warning comes on and you want to know whether the car is safe to drive or headed for a workshop. They suit owners who do their own maintenance, used-car buyers checking a vehicle before purchase and drivers who want a fault code explained in plain terms. They differ in how deep the diagnostics go, which adapter protocols they accept and how much of the useful data sits behind a paid upgrade. Some focus on quick code reading, others on live graphs such as coolant temperature, logging and manufacturer-specific sensors.

What to look for

  • Check which adapter chips and connection types the app supports, because a mismatch means it will not talk to your car at all.
  • Look at how fault codes are presented, since a plain description plus possible causes is far more useful than a bare code number.
  • Consider whether live data, freeze-frame records and sensor graphs are included or locked behind an upgrade, as these matter when you are chasing an intermittent fault.
  • Check what the app does with your vehicle data and location, because some ask for permissions that have nothing to do with reading a car.
  • See whether a scan history is stored on the phone, which helps when you want to compare readings before and after a repair.

How we rank

Apps are ranked by their Google Play rating (weighted by how many people rated them), their number of installs, how recently they were updated and how closely they fit the category. Only apps we've reviewed are included.