249+ iOS apps curated and reviewed
Every iPhone needs a few good diagnostic tool apps. We benchmark 249+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 5.0★ (4) | No | No | May 2026 |
| 2 |  | Free | 4.8★ (32K) | Yes | Yes | Aug 2026 |
| 3 |  | Free | 4.8★ (37K) | No | Yes | Aug 2026 |
| 4 |  | Free | 5.0★ (1) | No | No | Aug 2026 |
| 5 |  | Free | 1.5★ (4) | No | No | May 2026 |
| 6 |  | Free | 5.0★ (2) | No | No | May 2026 |
| 7 |  | Free | 4.4★ (328) | Yes | 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.
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.
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.
Connect to devices via Bluetooth to retrieve and display diagnostic data. Analyze information obtained through the protocol to troubleshoot and understand device status.
This tool connects to Kawasaki EFI engines via a wireless interface to diagnose issues. It requires a specific hardware purchase to function.
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 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.
Assess your mobile device's eligibility for protection plans. This tool guides you through a quick device verification process to determine coverage.
This app provides comprehensive system activity information for Apple devices, including detailed insights into hardware, sensors, and network status. It offers privacy controls, customizable widgets, and advanced testing and reporting features through optional in-app purchases.
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.
Diagnose hardware and system issues on your iPhone with comprehensive tests. Offers both quick and in-depth diagnostic modes to pinpoint problems.
This app helps you understand your iOS device's battery performance. It identifies battery runtimes and provides data to help you determine if your battery needs replacement. Monitor your device's battery health and runtime with detailed insights.
This app provides a comprehensive suite of network diagnostic tools for checking connectivity, latency, and speed. It offers features like live ping monitoring, speed tests, and various network utilities for quick troubleshooting.
Easily book diagnostic appointments for services like X-rays and ultrasounds. Select your nearest location and preferred services to schedule your test. Receive email confirmations for your bookings.
