Now available on iOS, Android, macOS & Windows

Your car's health,
finally clear.

OBDX connects to your vehicle's OBD2 port and gives you real-time diagnostics, engine codes, and live sensor data — all in plain language.

Download OBDX See features →
5M+ Downloads worldwide
4.8★ App Store rating
16+ Years of development
Engine: Normal
OBDX · Live Data
Engine Temp
91°C
Normal range
RPM
1,820
Speed
64 km/h
Fuel Load
43%
O₂ Sensor
OK
✓
No active DTCs
All systems passing
MIL reset saved $85
Compatible with Toyota Ford BMW Honda Volkswagen Chevrolet Mercedes
Capabilities

Everything your mechanic
doesn't want you to know

OBDX gives you direct access to your vehicle's onboard computer — the same data professionals use, in an interface anyone can understand.

⚠️
Read & Clear DTCs

Instantly decode Diagnostic Trouble Codes. Understand why the Check Engine Light is on and clear it yourself — no dealer visit required.

📊
Live Sensor Data

View 100+ real-time parameters: engine temperature, RPM, fuel pressure, O₂ sensors, mass airflow, and more — in numeric or graph view.

✅
Readiness Monitors

Check if your car will pass emissions inspection before you go. See which OBD readiness monitors are complete or still running.

🔍
Freeze Frame Data

Capture the exact conditions when a fault occurred. Freeze Frame data shows sensor values at the moment of the DTC trigger.

⛽
Fuel Economy Tracking

Monitor real-time fuel consumption and learn driving habits that save fuel. See instant and average economy stats on every trip.

🔧
Bi-directional Controls

Initiate service routines directly — including DPF regeneration for diesel vehicles and oxygen sensor tests. Advanced mode for pros.

Setup

Up and running
in under 3 minutes

No technical knowledge needed. If you can plug in a USB device, you can use OBDX.

01
Get an ELM327 adapter

Pick up any ELM327-based OBD2 dongle — Bluetooth, Wi-Fi, or USB. They're widely available for under $20. Our adapter guide helps you choose the best one for your device.

02
Plug into your OBD2 port

Find the 16-pin OBD2 port under your dashboard, near the steering column. Every car made after 1996 has one. Plug in the adapter — it takes two seconds.

03
Download OBDX & connect

Install OBDX on your iPhone, Android phone, Mac, or PC. Open the app, select your adapter from the list, and pair. You're connected.

04
Start diagnosing

Read trouble codes, view live sensor graphs, check emissions readiness, and monitor your engine — all in real time, right from your screen.

Connection flow
🚗
Your vehicle
OBD2 port · 16-pin · under dash
↕
🔌
ELM327 Adapter
Bluetooth / Wi-Fi / USB
↕
📱
OBDX App
iOS · Android · macOS · Windows
Works with any OBD2 car
All cars sold in the US after 1996, EU after 2001, and Australia after 2006 support OBD2 diagnostics.
Plans

Simple, honest pricing

Start for free. Unlock the full suite when you're ready. No subscriptions required — own it outright.

Free
$0
forever
Perfect for basic diagnostics and getting started with OBD2.
  • ✓ Read stored DTCs (Mode 3)
  • ✓ Basic live sensor data
  • ✓ Vehicle info & VIN
  • ✓ Readiness monitor status
  • ✕ Clear DTCs & reset MIL
  • ✕ Advanced sensors & graphs
  • ✕ Freeze Frame data
  • ✕ Data logging & export
Download free
Pro Most popular
$19
one-time purchase
The full OBDX experience. Everything you need to diagnose and maintain your car like a professional.
  • ✓ Everything in Free
  • ✓ Clear DTCs & reset MIL
  • ✓ 100+ live sensor parameters
  • ✓ Real-time graphing
  • ✓ Freeze Frame data
  • ✓ Pending & permanent DTCs
  • ✓ Fuel economy monitoring
  • ✓ Data logging & CSV export
Buy Pro — $19
Pro + Annual
$9
per year (renews annually)
Ideal if you want updates and cloud sync included. Best value for regular users and repair shops.
  • ✓ Everything in Pro
  • ✓ Automatic updates
  • ✓ Cloud data sync
  • ✓ Multi-vehicle profiles
  • ✓ Priority support
  • ✓ Bi-directional controls
  • ✓ OBD2 mode 9 parameters
  • ✓ DPF regen & oxygen tests
Start annual plan
📱 iPhone & iPad 🤖 Android 💻 macOS 🖥 Windows 🔵 Bluetooth ELM327 📶 Wi-Fi ELM327
About OBDX

Built by drivers,
for drivers.

OBDX started in 2010 as a side project by a small team of software engineers who were frustrated with expensive dealer diagnostic fees. The idea was simple: give everyday drivers the same diagnostic power that professionals have, without the complexity or the price tag.

Today, OBDX has over 5 million downloads and is trusted by drivers, DIY mechanics, and small repair shops in over 90 countries. We've stayed independent and focused on one thing: helping you understand your car better.

We believe car diagnostics should be accessible, affordable, and honest. No upsells. No confusing jargon. Just clear, useful information about your vehicle.

Simplicity first

Complex data, plain language. We translate ECU speak into things you can actually act on.

No subscriptions

Buy once, own forever. We don't believe in nickel-and-diming features you already paid for.

Privacy by design

Your vehicle data stays on your device. We don't collect or sell diagnostic information.

Always improving

Regular updates, new adapters, and features driven by real user feedback — not investor pressure.

5M+
downloads worldwide
90+
countries with active users
16yr
of continuous development
$0
in venture funding — proudly bootstrapped
Reviews

What drivers are saying

Real feedback from the OBDX community — on the App Store, Google Play, and beyond.

★★★★★

"Saved me hundreds of dollars, for sure. I was about to take my car to the dealer for a check engine light that turned out to be a loose gas cap. Cleared it myself in 10 seconds."

Randy K.
Everyday driver · App Store
★★★★★

"I'm an ASE-certified mechanic and I recommend this to every customer who wants to stay on top of their car's health between visits. Excellent value — you'll save the cost in one avoided repair."

Lloyd T.
ASE Mechanic · Google Play
★★★★★

"Brilliant software. Makes it incredibly easy to monitor parameters and identify problems without needing a professional scan tool. The live graphing feature alone is worth the price."

Dick W.
DIY Mechanic · App Store
★★★★★

"Used this for two weeks before buying the Pro plan — now I can't imagine not having it. Cleared a check engine light with ease and monitor my fuel economy on every commute."

Whatsapperism
Regular user · Google Play
★★★★☆

"I run a small repair shop and use OBDX as a quick first scan tool. It's fast, reliable, and covers every OBD2 mode I need for everyday diagnostics. Paired it with a cheap Bluetooth adapter and it works flawlessly."

Sean S.
Repair shop owner · App Store
★★★★★

"Simple interface, works with my cheap OBD reader, live sensor data, reading and clearing fault codes — everything I needed. The best OBD app I've tried after testing four others."

nordicnurse
Verified buyer · Google Play

Start diagnosing your car today — free.

Download OBDX See all features