Best Hardware Diagnostic Apps

216+ iOS apps curated and reviewed

4.5 avg rating
19 free apps
Updated June 2026

Diagnose Phone & Resale Value is the household name in hardware diagnostic, but it's far from the only option. We track 216+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Top Picks for Hardware Diagnostic

Diagnose Phone & Resale Value#1

Diagnose Phone & Resale Value by Arvinder Singh

Know Your Phone’s Market Value
Editor's Choice
🔧 Utilities
4.8(8 ratings)
FreeIn-App Purchases
Diagnose Phone & Resale Value screenshot 1
Diagnose Phone & Resale Value screenshot 2
Diagnose Phone & Resale Value screenshot 3

This app performs comprehensive hardware diagnostics on iPhones, checking everything from cameras and microphones to sensors and connectivity. It generates a shareable PDF report and provides an AI-powered resale price estimate. It also offers system status and helpful iPhone tips.

Car Scanner | OBD Auto Doctor#2

Car Scanner | OBD Auto Doctor by Creosys Oy

OBD2 diagnostics for ELM 327
Strong Contender
🔧 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

  • 🚀 Works great
  • 👍 Easy to use
  • 🚀 Accurate diagnostics
  • 🚀 Extensive adapter support

Room to Improve

  • 🔒 Requires subscription for full functionality
  • 🐛 Connection issues
  • 🐛 Inconsistent performance
Carly — OBD2 car scanner#3

Carly — OBD2 car scanner by Carly Solutions GmbH Co KG

Diagnose, Code and Service
Worth Considering
📊 Productivity
4.6😐(9.8K ratings)
FreeAdsIn-App Purchases
Carly — OBD2 car scanner screenshot 1
Carly — OBD2 car scanner screenshot 2
Carly — OBD2 car scanner screenshot 3
Carly — OBD2 car scanner screenshot 4
Carly — OBD2 car scanner screenshot 5
Carly — OBD2 car scanner screenshot 6

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.

What We Love

  • 👍 Great customer service
  • 🚀 Lots of functionality
  • 💡 Useful diagnostic and coding features
  • 🔒 Secure and reliable

Room to Improve

  • 💰 Expensive subscription model
  • 🐛 Connectivity and compatibility issues
  • 🔍 Limited functionality for some vehicles

More Hardware Diagnostic 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
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
🔧 Utilities
(34K)
free with in-app purchases
6
CPU Detector - Hardware Info
CPU Detector - Hardware Info
CPU Detector - Hardware Info
Display Hardware information
Free

Access detailed hardware information on your iPhone or iPad without jailbreaking. Monitor CPU usage, memory, battery health, sensor data, and network details in real-time. Ideal for tech enthusiasts and developers seeking in-depth device insights.

Real-time CPU usage and frequencyMemory usage monitoringBattery health and voltage check
🔧 Utilities
(427)
free with in-app purchases
7
Device Check & Hardware Test
Device Check & Hardware Test
Device Check & Hardware Test
Hardware Test & Benchmark Tool
Free
🔧 Utilities
(0)
8
OBD JScan
OBD JScan
OBD JScan
by Piotr Bialic
Free

This app provides advanced diagnostics for Jeep, Chrysler, and Dodge vehicles. It allows users to read and clear trouble codes, view live sensor data, and access settings across all vehicle modules, including ABS and transmission.

Read/Clear Diagnostic Trouble CodesAccess Live Data from all sensorsView vehicle settings
🔧 Utilities
(1.3K)
free with in-app purchases
9
TOPDON CarPal
TOPDON CarPal
TOPDON CarPal
OBDII Diagnostic Scan Tool
Free

Transform your phone into a powerful car diagnostic tool with this app. It offers comprehensive system scans, full OBDII functionality, and specialized maintenance services for a wide range of vehicle brands. Easily identify issues, access repair data, and generate detailed reports wirelessly.

Full System DiagnosisFull OBD2 Functions6 Special Maintenance Functions
🔧 Utilities
(35)
free with in-app purchases
10
AIDA64
AIDA64
AIDA64
by FinalWire
Free

Access in-depth hardware and software diagnostics for your iOS device. Get detailed information on your CPU, screen, battery, network, and sensors. Monitor memory, storage, and screen performance with this comprehensive utility.

CPU detailsScreen specificationsBattery status
🔧 Utilities
(2.1K)
free with in-app purchases
11
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
🔧 Utilities
(802)
free with in-app purchases
12
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
🔧 Utilities
(723)
free with in-app purchases
13
iDiagnostic
iDiagnostic
iDiagnostic
Hardware Diagnostic Tool
Free

This tool helps you quickly check the functionality of your iPhone or iPad's hardware components. It tests the display, touch screen, cameras, speakers, and microphone, ensuring everything is working as expected. Designed for privacy, all tests are performed on-device with no data collection.

Display color and dead pixel testConfigurable touch screen grid testCamera detection and individual testing
🔧 Utilities
(1)
free
14
CPU-Kit: Device Info & Monitor
CPU-Kit: Device Info & Monitor
CPU-Kit: Device Info & Monitor
Device Info and Phone Specs
Free

Gain deep insights into your device's hardware and performance with real-time monitoring and diagnostic tools. Personalize your home screen with aesthetic system widgets and export professional reports for support or resale.

Real-time CPU and RAM monitoringSystem widgets for home screenDetailed hardware specifications
🔧 Utilities
(8)
free with in-app purchases
15
Phone Doctor Plus
Phone Doctor Plus
Phone Doctor Plus
by iDea Mobile Tech Inc.
Free

Diagnose over 40 hardware and system issues with this app. Monitor your phone's hardware, battery, memory, and storage. Track network usage and daily charging cycles to keep your device running smoothly.

40+ hardware diagnostic testsSystem monitoring (hardware, battery, memory, storage)Daily battery capacity and charging cycle recording
🔧 Utilities
(325)
ad-supported
16
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
🔧 Utilities
(4K)
free with in-app purchases
17
System Status: hw monitor
System Status: hw monitor
System Status: hw monitor
CPU,battery,disk usage info
Free

Monitor your device's core performance metrics with this utility app. It provides real-time information on battery status, disk usage, CPU load, and network connections. Customize your view with light or dark themes and receive instant updates on system changes.

Graphical battery level displayDisk usage monitoringReal-time CPU usage
🔧 Utilities
(2.4K)
ad-supported
18
System Status Pro: hw monitor
System Status Pro: hw monitor
System Status Pro: hw monitor
CPU,battery,memory usage info
$3.99

Monitor your iPhone and iPad's performance with detailed insights into CPU, memory, disk, battery, and network usage. View real-time graphs, hardware specs, and system details. Export data via email or AirPrint.

Real-time CPU usage monitoringDetailed memory and disk usageBattery level and estimated work time
🔧 Utilities
(5.3K)
paid
19
Xtool Anyscan
Xtool Anyscan
Xtool Anyscan
OBD Diagnostic
Free

This smart diagnostic system connects to your iPhone or iPad to provide on-demand vehicle diagnostics. It offers comprehensive coverage for a wide range of car makes and includes full system diagnosis with various special functions.

Comprehensive vehicle coverageFull system diagnosisSpecial functions
🔧 Utilities
(70)
free
20
Diagnostic Tool
Diagnostic Tool
Diagnostic Tool
by Control Techniques Limited
Free

Quickly resolve error codes for Control Techniques' drives with this tool. It includes wiring diagrams for setup and fault finding, plus direct access to global technical support contact information.

Error code lookupWiring diagramsFault finding assistance
💼 Business
(4)
free