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Best Car Diagnostics Apps

219+ iOS apps curated and reviewed

4.6 avg rating
19 free apps
Updated June 2026

Looking for free car diagnostics apps? 19 of our 219+ tracked titles are free to download β€” no subscription, no trial. The rest are premium picks worth paying for.

Top Picks for Car Diagnostics

Car Scanner ELM OBD2#1

Car Scanner ELM OBD2 by Stanislav Svistunov

The best OBD2 diagnostic tool!
Editor's Choice
πŸ”§ Utilities
4.8😊(31K ratings)
FreeAdsIn-App Purchases
Car Scanner ELM OBD2 screenshot 1
Car Scanner ELM OBD2 screenshot 2
Car Scanner ELM OBD2 screenshot 3
Car Scanner ELM OBD2 screenshot 4
Car Scanner ELM OBD2 screenshot 5
Car Scanner ELM OBD2 screenshot 6

Monitor your car's performance, diagnose engine issues, and view sensor data in real-time. Customize your dashboard with gauges and charts, and reset fault codes. Supports a wide range of vehicles and offers advanced features for specific car brands.

What We Love

  • πŸš€ Works great with cheap OBD2 adapters
  • πŸ‘ Highly customizable dashboard
  • πŸ‘ Comprehensive sensor data
  • πŸ‘ Helpful error code lookup

Room to Improve

  • πŸ› Occasional connection issues
  • πŸ› Incorrect sensor readings for some vehicles
  • πŸ› Crashes or freezes on some devices
RepairSolutions2#2

RepairSolutions2 by Innova Electronics

Strong Contender
πŸ”§ Utilities
4.8😊(33K ratings)
FreeIn-App Purchases
RepairSolutions2 screenshot 1
RepairSolutions2 screenshot 2
RepairSolutions2 screenshot 3
RepairSolutions2 screenshot 4
RepairSolutions2 screenshot 5
RepairSolutions2 screenshot 6

This app provides comprehensive vehicle care and repair information for car and truck owners, DIYers, and technicians. It offers diagnostic capabilities with compatible OBD2 scanners and a vast database of verified fixes from ASE Master Technicians. Users can also access free vehicle maintenance information and schedule repairs.

What We Love

  • πŸ‘ Easy to use
  • πŸš€ Efficient and fast
  • πŸ’‘ Helpful diagnostic features
  • πŸ€‘ Good value for money

Room to Improve

  • πŸ› Connectivity issues
  • πŸ” Limited functionality
  • πŸ•°οΈ Slow app performance
Car Scanner | OBD Auto Doctor#3

Car Scanner | OBD Auto Doctor by Creosys Oy

OBD2 diagnostics for ELM 327
Worth Considering
πŸ”§ Utilities
4.4😐(6.1K ratings)
FreeAdsIn-App Purchases
Car Scanner | OBD Auto Doctor screenshot 1
Car Scanner | OBD Auto Doctor screenshot 2
Car Scanner | OBD Auto Doctor screenshot 3
Car Scanner | OBD Auto Doctor screenshot 4
Car Scanner | OBD Auto Doctor screenshot 5
Car Scanner | OBD Auto Doctor screenshot 6

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.

What We Love

  • πŸš€ Works great
  • πŸ‘ Easy to use
  • πŸš€ Accurate diagnostics
  • πŸš€ Extensive adapter support

Room to Improve

  • πŸ”’ Requires subscription for full functionality
  • πŸ› Connection issues
  • πŸ› Inconsistent performance

More Car Diagnostics apps to explore

4
FIXD OBD2 Scanner
FIXD OBD2 Scanner
FIXD OBD2 Scanner
Clear Your Check Engine Light
Free

This app translates your car's diagnostic trouble codes into plain language, helping you understand potential issues and their severity. It provides maintenance reminders and offers advanced features like issue forecasting and emissions pre-checks with a premium subscription.

Translate check engine light codesUnderstand issue severityMaintenance reminders
πŸ”§ Utilities
(26K)
free with in-app purchases
5
OBD Fusion
OBD Fusion
OBD Fusion
OBD2 scan tool & diagnostics
$9.99

This app connects to your car's OBD2 port via a compatible adapter to read vehicle data. Monitor fuel economy, clear check engine lights, and create custom dashboards for real-time diagnostics and performance tracking.

Read and clear OBD2 trouble codesCustomizable real-time dashboardsEstimate fuel economy
✈️ Travel
(123)
free with in-app purchases
6
Auto Agent
Auto Agent
Auto Agent
by EZ LYNK
Free

Monitor, diagnose, and update your vehicle's software remotely. This powerful tool allows you to view live data, read and clear diagnostic codes, and record data for your technician. Connect directly with your mechanic for remote assistance and software updates, saving you trips to the repair shop.

Display live vehicle dataRead and clear diagnostic trouble codesCreate and playback data recordings
πŸ”§ Utilities
(34K)
free with in-app purchases
7
Carly β€” OBD2 car scanner
Carly β€” OBD2 car scanner
Carly β€” OBD2 car scanner
Diagnose, Code and Service
Free

This app allows car owners to diagnose issues, monitor live engine data, and perform maintenance tasks. It offers advanced features like coding hidden car functions and detecting mileage manipulation, helping users save on repairs and understand their vehicle's health.

Read and clear fault codes from all ECUsMonitor engine live data parametersStep-by-step car repair guides
πŸ“Š Productivity
(9.8K)
free with in-app purchases
8
Carista OBD2
Carista OBD2
Carista OBD2
Code, Service, Diagnose cars
Free

This app acts as a DIY car mechanic, allowing you to customize features, diagnose warning lights, monitor live data, and perform maintenance. Save time and money by handling common car tasks yourself.

Customize car behavior and unlock hidden featuresDiagnose and reset dashboard warning lightsMonitor real-time vehicle parameters
πŸ”§ Utilities
(3.9K)
free with in-app purchases
9
OBD2 Car Scanner - EOBD Facile
OBD2 Car Scanner - EOBD Facile
OBD2 Car Scanner - EOBD Facile
Torque ELM327 Diagnostic Tool
Free

Transform your smartphone into a professional car diagnostic tool. Read and clear engine fault codes, monitor real-time sensor data, and perform advanced diagnostics without a mechanic. Supports a wide range of OBD2 compliant vehicles.

Read and clear engine fault codesMonitor real-time sensor dataTurn off check engine light
πŸ”§ Utilities
(4.9K)
free with in-app purchases
10
BlueDriver OBD2 Scan Tool
BlueDriver OBD2 Scan Tool
BlueDriver OBD2 Scan Tool
Fear No Fixβ„’
Free

This app turns your smartphone into a powerful OBD2 scan tool. It allows you to read and clear trouble codes, view live data, and generate detailed repair reports for your vehicle. Understand your car's issues and make informed repair decisions.

Read and clear trouble codes (Check Engine, ABS, etc.)Generate professional-grade Repair ReportsAccess Mode 6 and smog readiness data
πŸ“Š Productivity
(14K)
free with in-app purchases
11
OBDeleven – OBD2 car scanner
OBDeleven – OBD2 car scanner
OBDeleven – OBD2 car scanner
Diagnostics, service & coding
Free

Transform your smartphone into a powerful car diagnostic and customization tool. Easily scan trouble codes, monitor live data, and access advanced features like coding and service functions for a wide range of car brands. Save time and money on car maintenance and personalization.

Basic OBD2 diagnosticsLive data monitoringAdvanced diagnostics for licensed brands
πŸ”§ Utilities
(1.2K)
free with in-app purchases
12
OBD2 Car Scanner - Torque FixD
OBD2 Car Scanner - Torque FixD
OBD2 Car Scanner - Torque FixD
OBD2 ELM Diagnostic, Car HUD
Free

Diagnose your car's engine and transmission with real-time data, customizable dashboards, and emissions readiness checks. This app connects to your vehicle's OBD2 system via Wi-Fi or Bluetooth for comprehensive maintenance and performance insights.

Comprehensive diagnosticsCustomizable dashboardReal-time monitoring
πŸ”§ Utilities
(908)
free with in-app purchases
13
OBDLink
OBDLink
OBDLink
by OBD Solutions LLC
Free

Transform your phone into a powerful car diagnostic tool. Read and clear trouble codes, monitor real-time engine data, and track fuel economy. Generate detailed reports for easy sharing and analysis.

Read and clear diagnostic trouble codesDisplay real-time vehicle dataCustomizable dashboards
✈️ Travel
(12K)
free with in-app purchases
14
DriveVerse: AI Car Diagnostics
DriveVerse: AI Car Diagnostics
DriveVerse: AI Car Diagnostics
Diagnose car sounds with AI
Free

This app uses AI to analyze car sounds, providing insights into potential issues, estimated repair costs, and urgency. It helps track car problems over time, compare symptoms, and understand trends for smarter maintenance and proactive ownership.

AI sound diagnosticsConfidence levels and repair cost estimatesIssue tracking and trend analysis
πŸ”§ Utilities
(4)
free with in-app purchases
15
OBD2 Scanner: Torque ELM 327
OBD2 Scanner: Torque ELM 327
OBD2 Scanner: Torque ELM 327
Torque OBD2 Car Scanner ELM327
Free

Transform your smartphone into a powerful car diagnostic tool. Monitor real-time engine data, read and clear trouble codes, and track your vehicle's performance. Customize your dashboard and access repair manuals to understand and fix issues.

Real-time engine data monitoringRead and clear trouble codesPerformance tracking
πŸ”§ Utilities
(802)
free with in-app purchases
16
OBDeleven VAG
OBDeleven VAG
OBDeleven VAG
Scan your car & clear faults
Free

Transform your smartphone into a powerful car diagnostic tool. Easily scan, diagnose, and customize your vehicle's settings. Access advanced features like coding and live data to save time and money on car maintenance.

Advanced diagnosticsCoding and adaptationsOutput tests
πŸ”§ Utilities
(6.6K)
free with in-app purchases
17
Car Scanner OBD2 Torque Pro
Car Scanner OBD2 Torque Pro
Car Scanner OBD2 Torque Pro
OBD2 Scan for Car Diagnostic
Free

This app transforms your device into a powerful car diagnostic tool. It allows you to monitor real-time sensor data, read and interpret diagnostic trouble codes (DTCs), and access detailed information about your vehicle's systems. Compatible with most cars manufactured after 1996.

Real-time sensor data monitoringRead and interpret DTCsAccess Parameter Identification Codes (PIDs)
πŸ”§ Utilities
(883)
free with in-app purchases
18
BimmerLink
BimmerLink
BimmerLink
by SG Software GmbH & Co. KG
Free
$39.99 | 100% OFF

This app provides direct access to your BMW or MINI vehicle's systems. Read and clear trouble codes from all control units, monitor real-time sensor values, and control features like exhaust flaps and active sound design. It also supports battery registration, DPF regeneration, and service resets.

Read and clear trouble codes from all control unitsDisplay real-time sensor valuesRemote control of exhaust flap
πŸ“Š Productivity
(7.6K)
free with in-app purchases
19
ThinkDiag+
ThinkDiag+
ThinkDiag+
by THINKCAR INC
Free

This app provides professional-level vehicle diagnostics, offering features like reading/clearing fault codes, data flow analysis, and special maintenance functions. It supports a wide range of car brands and allows users to subscribe to specific diagnostic software. Connects via Bluetooth to your smartphone for intelligent vehicle analysis.

OE-level diagnostic functionsFull OBD II diagnosisSpecial maintenance functions
πŸ”§ Utilities
(4K)
free with in-app purchases
20
MotorData OBD ELM car scanner
MotorData OBD ELM car scanner
MotorData OBD ELM car scanner
Car diagnostic. Dashboard.
Free

Transform your smartphone into a comprehensive car diagnostic tool. Read and clear trouble codes, monitor real-time vehicle performance, and customize your dashboard for a deeper understanding of your car's health. Includes free engine diagnostics with optional advanced features for specific brands.

Deep diagnostics for up to 25 ECUsOne-touch scan for trouble codesDecode DTCs and clear Check Engine Light
πŸ”§ Utilities
(723)
free with in-app purchases

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