The best obd code apps on iPhone average 4.4★ across 227+ titles — we've ranked them by what real users actually keep on their phones. Updated April 2026.
Access a mobile DIY car mechanic with the Carista App – code, diagnose warning lights, monitor live data, and service your car easily. Save time and money on workshop visits, unlock hidden features, and customize your car's behavior with a wide range of supported car brands. Visit https://carista.com/supported-cars to check compatibility.
Turn your phone or tablet into a powerful diagnostic scan tool with this app, designed exclusively for use with OBDLink MX, CX, and MX WiFi adapters. Enjoy features such as checking and clearing trouble codes, real-time data display, emissions readiness, fuel economy estimation, customizable dashboards, and more. Get detailed insights into your vehicle's performance effortlessly!