RevScan - OBD2 Diagnostics

Denver Freelance

About this app

RevScan — Professional OBD2 Car Diagnostics

Turn your Android phone into a professional-grade vehicle diagnostic tool. RevScan connects to your car via any ELM327 Bluetooth, USB, or WiFi adapter and gives you real-time access to your vehicle's onboard computer.

Fault Code Scanner
Read, research, and clear diagnostic trouble codes (DTCs) instantly. RevScan includes a database of thousands of OBD2 fault codes with detailed descriptions — no internet required. Supports confirmed, pending, and permanent codes.

Live Data Dashboard
Monitor your engine in real time with a clean, modern dashboard:

RPM and vehicle speed
Engine load and throttle position
Coolant and oil temperature
Intake air temperature and MAF airflow
Fuel level and fuel trims
Battery voltage
Manifold pressure (MAP)
Freeze Frame Data
View the exact sensor readings captured at the moment a fault code was triggered — giving you the full picture of what caused the problem.

Sensor Graphs
Track sensor trends over time with live scrolling graphs. Spot intermittent issues and monitor engine health during a drive.

Vehicle Health Score
Get an at-a-glance health rating based on your live data and active fault codes. Know immediately if something needs attention.

Vehicle Detection
RevScan automatically identifies your vehicle via VIN lookup using the free NHTSA database — no account or login required.

Session History
Every diagnostic session is saved locally on your device. Review past sessions, track trends, and monitor your vehicle's health over time.

Data Logging
Record live sensor data to a CSV file and export it for analysis in Excel or Google Sheets.

Universal Compatibility
Works with any ELM327-compatible OBD2 adapter over Bluetooth, WiFi, or USB. Compatible with all OBD2-compliant vehicles sold in the US after 1996.

100% Private
RevScan works completely offline. No account required. No data collected. Your vehicle data never leaves your device.

RevScan is a diagnostic tool intended for informational purposes. Always consult a qualified mechanic for repairs.

What’s new

New: Shop Manuals - look up real repair manuals for your vehicle right in the app, from Home, the Dashboard, or a fault code. Works even without a live connection.
New: Tap any diagram in a manual to view it full-screen with pinch-to-zoom and pan.
Improved: More accurate manual lookup for Mercedes-Benz, Dodge, Ram, and Nissan vehicles.
Fixed: Some vehicle models (e.g. Honda Accord, Civic) were missing from manual search results.