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Best Engine Code Reader App

225+ iOS apps curated and reviewed

4.5 avg rating
20 free apps
Updated June 2026

Every iPhone needs a few good engine code reader app apps. We benchmark 225+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Top Picks for Engine Code Reader App

Car Scanner ELM OBD2#1

Car Scanner ELM OBD2 by Stanislav Svistunov

The best OBD2 diagnostic tool!
Editor's Choice
🔧 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

  • 🚀 Works great with cheap OBD2 adapters
  • 👍 Highly customizable dashboard
  • 👍 Comprehensive sensor data
  • 👍 Helpful error code lookup

Room to Improve

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

RepairSolutions2 by Innova Electronics

Strong Contender
🔧 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

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

Room to Improve

  • 🐛 Connectivity issues
  • 🔍 Limited functionality
  • 🕰️ Slow app performance
BlueDriver OBD2 Scan Tool#3

BlueDriver OBD2 Scan Tool by Root Four Imagination Inc.

Fear No Fix™
Worth Considering
📊 Productivity
4.6😊(14K ratings)
Free
BlueDriver OBD2 Scan Tool screenshot 1
BlueDriver OBD2 Scan Tool screenshot 2
BlueDriver OBD2 Scan Tool screenshot 3
BlueDriver OBD2 Scan Tool screenshot 4
BlueDriver OBD2 Scan Tool screenshot 5

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.

What We Love

  • 👍 Easy to use
  • 🚀 Excellent diagnostic capabilities
  • 💰 Great value for money
  • 🔍 Detailed fault code information

Room to Improve

  • 🐛 Occasional Bluetooth connectivity issues
  • ⚠️ Limited support for some vehicle makes/models
  • 🚫 Cannot read odometer information

More Engine Code Reader App apps to explore

4
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
🔧 Utilities
(4.9K)
free with in-app purchases
5
OBD2 Trouble Code
OBD2 Trouble Code
OBD2 Trouble Code
OBD ll Code Reader Guide
Free

Instantly look up your car's check engine codes on the go. Access a vast database of OBD2 codes with descriptions and potential causes for all major manufacturers. Save your search history for quick reference.

OBD2 code lookupCheck engine code descriptionsPossible cause identification
🔧 Utilities
(297)
free
6
QR Code Reader，Barcode Scanner
QR Code Reader，Barcode Scanner
QR Code Reader，Barcode Scanner
QR Code Generator for iPhone
Free

Instantly scan and generate QR codes and barcodes. Compare prices, manage inventory, and create custom codes for various purposes. Supports multiple formats and batch scanning for efficient organization.

Instant QR code and barcode scanningQR code and barcode generationPrice comparison for shopping
🔧 Utilities
(65K)
free with in-app purchases
7
QR Reader for mobile
QR Reader for mobile
QR Reader for mobile
QR Code, Barcode & PDF Scanner
Free

Quickly scan QR codes and barcodes to access information, browse products, and find coupons. Create your own codes and share them easily. Offers advanced features like PIN lock and Siri Shortcuts for enhanced usability.

Scan QR codes and barcodesCreate QR codes and barcodesSupports 25 scanning formats
🔧 Utilities
(9.2K)
free with in-app purchases
8
Car Scanner | OBD Auto Doctor
Car Scanner | OBD Auto Doctor
Car Scanner | OBD Auto Doctor
OBD2 diagnostics for ELM 327
Free

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.

Read and clear OBD2 diagnostic trouble codes (DTC)Reset Check Engine LightMonitor real-time vehicle data and sensor readings
🔧 Utilities
(6.1K)
free with in-app purchases
9
Easy QR Code Reader - Scanner
Easy QR Code Reader - Scanner
Easy QR Code Reader - Scanner
QR Scanner - Fast and Simple
Free

Scan QR codes instantly upon launching the app. Easily open URLs, emails, and other content with a single tap. Features include a flashlight for low-light scanning and automatic saving of scan history.

Quick scan on launchOne-tap URL openingEmail and tracking support
📊 Productivity
(1.6K)
ad-supported
10
QR Code Reader + QR Scanner
QR Code Reader + QR Scanner
QR Code Reader + QR Scanner
QR Code Scanner & QR Generator
Free

Easily scan and generate QR codes and barcodes with this fast and accurate utility. Access website URLs, Wi-Fi passwords, and product information instantly. Create custom QR codes for sharing contact details, social media, and more.

Fast QR code and barcode scanningQR code reader for all typesBarcode reader for product information
🔧 Utilities
(6.4K)
free with in-app purchases
11
Koder Code Editor
Koder Code Editor
Koder Code Editor
(S)FTP, Dropbox, Webdav, SSH
Free

A powerful code editor for mobile devices, offering syntax highlighting for over 80 languages, remote file access, and a built-in terminal. Perfect for developers who need to code on the go with a well-designed interface.

Syntax highlighting for 80+ languagesRemote file access (SFTP, Dropbox, WebDAV)Built-in SSH client
🛠️ Developer Tools
(9.3K)
paid
12
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
🔧 Utilities
(3.9K)
free with in-app purchases
13
Free QR Code Reader simply to scan a QR Code
Free QR Code Reader simply to scan a QR Code
Free QR Code Reader simply to scan a QR Code
by NAKAYUBI CORPORATION
Free

Easily read and generate QR codes with this straightforward application. It allows for quick scanning of existing codes and the creation of new ones from text or URLs. All scanned and generated codes are conveniently stored in a history for later access.

QR code readingQR code generationHistory management
📊 Productivity
(1.9K)
free
14
ICONIT QRcode Reader
ICONIT QRcode Reader
ICONIT QRcode Reader
QR code & barcode scanner
Free

This app offers rapid and accurate scanning of QR codes and barcodes, even those unreadable by other scanners. It provides instant information retrieval, scan history, and the ability to create QR codes. Enjoy additional features like product review searches and daily fortune-telling.

Instant QR code and barcode scanningScan history saving and exportScan from saved images
📊 Productivity
(327)
free with in-app purchases
15
Code Scanner QR Barcode Reader
Code Scanner QR Barcode Reader
Code Scanner QR Barcode Reader
Read EAN DataMatrix Aztec Bar
Free

Easily scan, read, and decode over 20 types of QR codes and barcodes. Save your scan history, generate custom codes, and view product details. Supports various scanning methods and export options.

Scan 20+ QR code and barcode typesScan from photosGenerate custom QR codes
🔧 Utilities
(640)
free with in-app purchases
16
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
📊 Productivity
(7.6K)
free with in-app purchases
17
Simple QR/Barcode Reader
Simple QR/Barcode Reader
Simple QR/Barcode Reader
Easy QR code Scanner
Free

This app quickly and accurately scans QR codes and barcodes using your smartphone's camera. It offers simple operation, saves scan history, and provides relevant actions based on scanned content. Advertisements can be removed with a purchase.

Fast and accurate scanningScan from photosSimple one-tap operation
🔧 Utilities
(253)
free with in-app purchases
18
QR Code Pro Reader
QR Code Pro Reader
QR Code Pro Reader
QR code recognition & creation
Free

Easily scan and create various types of QR codes and barcodes, including encrypted and social media links. Customize designs, generate codes from images/videos, and extract text with OCR. Keep track of your history and personalize the scanning experience.

Barcode and QR code scanningEncrypted QR code supportCreate various QR code types
🔧 Utilities
(30)
freemium
19
AI QR Code Reader & Generator
AI QR Code Reader & Generator
AI QR Code Reader & Generator
Barcode scanner & create code
Free

Easily create and scan QR codes for various purposes, including WiFi sharing and product information. Convert any data into a scannable code or recognize multiple code types from photos or directly.

Create and customize QR codesGenerate profile codes with linksQuickly identify QR codes and barcodes
🔧 Utilities
(188)
free with in-app purchases
20
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
🔧 Utilities
(1.2K)
free with in-app purchases