Smart OBD2 diagnostics, on your terms.

A local-first diagnostics app for ELM327 adapters that goes beyond raw data — it interprets fault codes, walks you through guided repair playbooks, and shows live PIDs in context.

What it does

• Read & clear DTCs — Mode 03 scan with vehicle-aware code descriptions, freeze-frame capture, and Mode 04 clear.
• Guided diagnostics — A decision-tree engine narrows down likely root causes from live PID samples, with confidence ranking.
• Repair playbooks — Step-by-step fix instructions with live PID feedback ("RPM jumped? → resolved").
• Live vitals — Coolant, battery, fuel level, intake — at a glance on the home screen.
• Session history — Compare any two sessions side-by-side with DTC diff and PID trend charts.
• Local & offline — No account, no cloud, no analytics. Your data stays on your phone.

Privacy first

DiagNova collects no personal data. No accounts, no tracking, no third-party analytics. Bluetooth pairing is local. Your diagnostic database lives on your device and is removed when you uninstall the app.

Read the full privacy policy →

Supported adapters

Any ELM327-compatible OBD2 adapter — BLE (Bluetooth Low Energy), Classic Bluetooth on Android, and WiFi adapters. Common clones (V-Link, Konnwei, Veepeak, BAFX) are auto-detected during scanning.

Contact

Questions, feedback, or bug reports: info@kingdroid.eu