OBD Ninja: OBD2 MPG, JDM Chime

skyphic studio

In-app purchases

About this app

OBD Ninja turns your car into a smart cockpit. Connect any Bluetooth LE ELM327 OBD2 adapter and watch your vehicle's hidden data come alive — speed, RPM, fuel economy (MPG), estimated horsepower, G-force, coolant temperature, and more — on beautifully designed real-time dashboards.

From daily commutes to road trips and track days, OBD Ninja records every drive with GPS logs, dash cam footage, and telemetry overlays you can replay anytime.

【Key Features】

■ GT View — Dash Cam with Telemetry Overlay
Record your drive with live OBD2 data, speed, G-meter, and gauges burned into the video. The racing-sim inspired HUD turns each clip into a shareable cockpit-cam reel — for touge runs, track days, or tuning analysis. Playback at up to 8x.

■ Real-Time OBD2 Dashboard
Live vehicle data straight from your OBD2 port. Multiple themes and layouts — from minimalist gauges to full cockpit-style displays.

■ Estimated Power & Virtual Dyno
"How much horsepower am I making right now?" OBD Ninja estimates power and torque from fuel flow and shows them live on your dashboard, with peak values (Max) and the RPM where they occurred.
After the drive, open any drive log and switch to Virtual Dyno: it analyzes the whole drive and draws a chassis-dyno-style power and torque curve against RPM — see your car's power band without a dyno.
With Premium, Power Calibration refines the estimate for your specific car using a correction factor derived from your own drive logs.
※ Estimates are derived from fuel flow and are for reference only, not a substitute for measured values.

■ Fuel Economy Monitor & Coin Alert
Track real-time MPG (or km/L, L/100km) plus the volume and cost of fuel consumed. Coin Alert plays a satisfying coin sound every time you spend a set amount (e.g., every 10 cents) — frugal driving becomes a game.

■ Drive Log (GPS + OBD2 Tracking)
Sync GPS and OBD2 data into a single timeline. Replay any past drive on a map and analyze it section by section.

■ Save Playback as a Video (Screen Recording)
Save the playback screen of any drive log — Dashboard or GT View, exactly as shown — as a video. Tap to stop; app sounds such as the speed chime are captured too. No subscription required.

■ JDM Speed Chime
A faithful recreation of the nostalgic 100 km/h warning chime found in classic Japanese cars — a tribute to JDM culture.
With GPS Chime Mode, no OBD2 adapter is required: the chime works on GPS speed alone, on a dedicated screen with a map and a large speed readout.

■ Flexible Customization
Adjust gauge ranges, layouts, color themes, and warning thresholds. Choose km/h / mph, °C / °F, km/L / MPG / L/100km, and PS / HP / kW for power.

■ PC Integration
Transfer drives to your PC via QR code. The free desktop companion exports videos and time-lapses and manages your drive library.

【Perfect For】
・Drivers who want to visualize fuel economy and driving habits
・Anyone curious how much horsepower their car is really making
・Anyone who wants a dash cam with real-time telemetry overlay
・Track day enthusiasts logging telemetry from their car
・Road trip lovers who want to keep GPS logs of their journeys
・JDM culture fans who miss the classic speed warning chime

【Requirements】
Compatible with OBD2-compliant vehicles (OBD-II / EOBD).
Requires a Bluetooth Low Energy (BLE) ELM327 OBD2 adapter — Wi-Fi and classic Bluetooth adapters are NOT supported.
Some features, such as GPS Chime Mode, work without an adapter.

【Premium Subscription】
Some advanced features require a Premium subscription (Monthly or Yearly) with a 14-day free trial. Subscriptions auto-renew unless cancelled at least 24 hours before the renewal date. Manage or cancel anytime in Google Play → Subscriptions.

Website: https://www.obd-ninja.com/
Terms of Service: https://www.obd-ninja.com/terms
Privacy Policy: https://www.obd-ninja.com/privacy-policy

Drive smarter. Drive deeper. OBD Ninja.

What’s new

- Export your drive as a GPX file: save it to Files or send it to other apps from the share sheet
- Removed "Share to SNS" from the record details
- Stability improvements to playback