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Best Car Diagnostics Apps

248+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated September 2026

Looking for free car diagnostics apps? 20 of our 248+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Compare top Car Diagnostics Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1RepairSolutions2RepairSolutions2Free4.8★ (38K)NoYesSep 2026
2Car Scanner ELM OBD2Car Scanner ELM OBD2Free4.8★ (32K)YesYesSep 2026
3AI Car Doctor: OBD DiagnosticsAI Car Doctor: OBD DiagnosticsFree—NoYesJun 2026
4MotorData OBD ELM car scannerMotorData OBD ELM car scannerFree4.6★ (48)NoYesAug 2026
5Auto AgentAuto AgentFree4.9★ (34K)NoYesSep 2026
6FIXD OBD2 ScannerFIXD OBD2 ScannerFree4.6★ (26K)NoYesSep 2026
7BlueDriver OBD2 Scan ToolBlueDriver OBD2 Scan ToolFree4.6★ (14K)NoNoSep 2026
8OBD2UDS - Car Diagnostic ProOBD2UDS - Car Diagnostic ProFree—NoYesJul 2026

Top Picks for Car Diagnostics

RepairSolutions2#1

RepairSolutions2 by Innova Electronic

Editor's Choice
🔧 Utilities
4.8😊(38K ratings)
FreeIn-App Purchases
RepairSolutions2 screenshot 1
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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

  • 👍 Easy to use
  • 🚀 Efficient and fast
  • 💡 Helpful diagnostic features
  • 🤑 Good value for money
  • 🔧 Useful for DIY mechanics

Room to Improve

  • 🐛 Connectivity issues
  • 🔍 Limited functionality
  • 🕰️ Slow app performance
  • 🔋 Firmware update process
Car Scanner ELM OBD2#2

Car Scanner ELM OBD2 by Stanislav Svistunov

The best OBD2 diagnostic tool!
Strong Contender
🔧 Utilities
4.8😊(32K ratings)
FreeAdsIn-App Purchases
Car Scanner ELM OBD2 screenshot 1
Car Scanner ELM OBD2 screenshot 2
Car Scanner ELM OBD2 screenshot 3
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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

  • 🚀 Works great with cheap OBD2 adapters
  • 👍 Highly customizable dashboard
  • 👍 Comprehensive sensor data
  • 👍 Helpful error code lookup
  • 👍 Frequent updates
  • 👍 Affordable pro version
  • 👍 Supports many vehicle makes/models

Room to Improve

  • 🐛 Occasional connection issues
  • 🐛 Incorrect sensor readings for some vehicles
  • 🐛 Crashes or freezes on some devices
  • 🔋 Drains battery when left running

More Car Diagnostics apps to explore

FAQ about Car Diagnostics

What are the best car diagnostics apps for iPhone?
RepairSolutions2 tops our car diagnostics apps ranking as of September 2026, with a 4.8-star average from 38K App Store ratings, and it's free to download.
Yes — 20 of the top car diagnostics apps we rank are free to download, including RepairSolutions2 and Car Scanner ELM OBD2.
RepairSolutions2 has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 248+ car diagnostics apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
RepairSolutions2 offers a comprehensive automotive repair database with verified fixes from ASE Master Technicians. It provides vehicle care information, diagnostic capabilities when paired with compatible OBD2 scanners, and allows users to find and purchase necessary parts. The app also includes features for tracking scheduled maintenance and scheduling repairs.
Key features include looking up DTC code definitions with ASE-verified fixes, performing complete vehicle scans, reading/erasing DTC codes, accessing a customizable LIVE data feed, tracking scheduled maintenance, predicting potential repairs, and an option to schedule repairs through RepairPal. Users can also view vehicle maintenance and recall information even without an OBD2 tool.

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