247+ iOS apps curated and reviewed
From beginner-friendly picks to power-user tools, our diagnostic tool app list covers 247+ iPhone apps updated through August 2026. Compare ratings, prices, and screenshots in one place.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 5.0★ (4) | No | No | May 2026 |
| 2 |  | Free | 4.8★ (37K) | No | Yes | Aug 2026 |
| 3 |  | Free | — | No | No | May 2026 |
| 4 |  | Free | 4.6★ (14K) | No | No | Aug 2026 |
| 5 |  | Free | 2.9★ (83) | No | No | Aug 2026 |
| 6 |  | Free | 5.0★ (1) | No | No | Aug 2026 |
| 7 |  | Free | 2.0★ (18) | No | No | Aug 2026 |
| 8 |  | Free | 5.0★ (1) | No | No | May 2026 |
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.
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.
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.
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.
Connect to devices via Bluetooth to retrieve and display diagnostic data. Analyze information obtained through the protocol to troubleshoot and understand device status.
This app provides comprehensive vehicle diagnostics and special functions for a wide range of car models. It connects to diagnostic instruments, allowing for anytime, anywhere automobile fault diagnosis on your mobile device.
Assess your mobile device's eligibility for protection plans. This tool guides you through a quick device verification process to determine coverage.
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.
Access and monitor your lab results from Diagnostic Laboratory Services. Receive notifications for new results and quickly find DLS lab locations. This app helps you stay informed about your health diagnostics.
This app helps heavy-duty truck owners diagnose and resolve common issues like fault codes, regen problems, and derates. It provides plain-language explanations of error codes, allows for bi-directional commands to fix issues, and monitors live truck data to prevent downtime.
This tool connects to Kawasaki EFI engines via a wireless interface to diagnose issues. It requires a specific hardware purchase to function.
This diagnostic system connects to your iPhone or iPad to provide comprehensive vehicle coverage and full system diagnosis. It offers various special functions and features a small, portable design with a Bluetooth wireless connection.
This utility app analyzes your network to determine compatibility with a WiFi analytics service. It helps businesses understand visitor behavior in public spaces like libraries and museums by providing previously unseen insights.
Diagnose hardware and system issues on your iPhone with comprehensive tests. Offers both quick and in-depth diagnostic modes to pinpoint problems.
This diagnostic system connects to your iPhone or iPad via Bluetooth to provide comprehensive vehicle coverage and full system diagnosis. It offers various special functions tailored to user needs, all within a small, portable device.
This app allows you to perform vehicle scans and connect with a technician using a compatible device. It offers pre- and post-scans, vehicle programming, and automatic email delivery of results and invoices.
This diagnostic tool connects to trucks via Bluetooth to read and clear fault codes, monitor data streams, and perform DPF regeneration and speed limit calibration. It supports various popular truck engine models and offers real-time updates for advanced functions.