Best Diagnostic Apps

sysdiagnose

Local Sysdiagnose Insights

Free

This utility app parses complex iOS diagnostic files into easy-to-understand reports directly on your device. It offers a full checkup flow, structured insights into device health, and the ability to compare trends over time. Share reports as images, PDF, or JSON.

Car Scanner ELM OBD2

The best OBD2 diagnostic tool!

Free

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.

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.

RepairSolutions2

by Innova Electronic

Free

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.

iChecker: Phone Diagnostics

Battery Health & System Status

Free

This app performs comprehensive hardware diagnostics on your iPhone, checking 39 critical components. It provides an overall health grade and detailed test results, helping you identify potential issues before they become costly repairs. Generate shareable reports and monitor your device's health over time with routine checks.

PhonePass Diagnostic

Guided Hardware Diagnostics

Free

This app guides technicians through structured hardware diagnostic inspections for phones. It offers a comprehensive suite of automated tests for display, camera, audio, sensors, connectivity, and more, allowing for immediate pass/fail recording and export of results.

OBD2 Scanner | OBD Auto Doctor

Car Diagnostics & Check Engine

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.

BLE Diagnostic Tool

BLE Diagnostic Tool

Free

Connect to devices via Bluetooth to retrieve and display diagnostic data. Analyze information obtained through the protocol to troubleshoot and understand device status.