AI-powered buyer insights

Trust the car’s data, Not the sales pitch.

Know what you're buying before you pay. Plug in your Bluetooth OBD‑II scanner. Diagnose AI does the digging for you. It uncovers hidden trouble codes, detects possible code resets, spots possible VIN mismatches, and checks safety recalls.

Explains check-engine codes in plain English
Flags signs of recently cleared codes
VIN and recall checks
AI-powered buyer report
Supports many U.S. vehicles
Official U.S. safety recall checks
Read-only OBD-II scanning
The information gap

A car can look perfect and still hide expensive problems.

When you buy used, the seller usually knows the vehicle better than you do. A clean dashboard is helpful—but it is not the whole story.

  • A recently cleared warning light can make a problem harder to spot in a quick test drive.
  • You may not know which signals deserve a mechanic's second opinion before you commit.
  • A basic code reader gives you data but little help deciding what to do next.
The Diagnose AI way

More evidence. Less guessing.

Diagnose AI organizes the signals available from the vehicle into a buyer-friendly report, so you can understand what deserves a closer look before you negotiate.

Plain-English signals

Understand codes, readiness, and vehicle data without a mechanic dictionary.

Clear priorities

See what may be routine and what deserves a closer look before you buy.

Better seller questions

Leave with a practical list of items to discuss, verify, or inspect further.

Buyer confidence

Bring clarity to the driveway.

Your AI Buyer Report

1
Identify the vehicle Use the VIN to help identify the vehicle and review applicable open safety recalls.
2
Read available evidence Review trouble codes, readiness monitors, and supported vehicle data from a compatible adapter.
3
Spot consistency clues See potential reset or VIN mismatch signals that may be worth asking about.
4
Know what to ask next Review priorities and practical questions for the seller or a pre-purchase mechanic.

VIN and recall context

Confirm vehicle specs against the physical VIN plate and check for unperformed safety recalls before you buy.

VIN Plate MatchVerified
NHTSA Safety Recalls1 Open Recall
ECU System ReadinessComplete

Turn scan signals into the right seller questions

Diagnose AI interprets obscure fault codes and readiness flags so you know exactly what to ask the seller or a mechanic.

Readiness incomplete “Were the codes cleared—or was the battery disconnected?”
Pending code found “Have you noticed a warning light or hesitation?”
Open safety recall “Has a dealer completed this recall repair?”

Illustrative sample. Results and available data vary by vehicle, adapter, and vehicle-system support.

For current car owners

Check-engine light on? Start with context, not panic.

Connect your scanner to turn supported codes and vehicle data into a plain-English explanation, practical next steps, and likely repair possibilities—so you can speak with a mechanic better prepared.

Get the app Informational guidance only. Safety-critical concerns should always be verified by a qualified mechanic.

What the code means

Translate technical fault codes into language you can actually understand.

What to do next

See what may need attention now and what can be investigated next.

Likely repair paths

Review possible causes and repair outcomes, ordered from more likely to less likely.

Better mechanic questions

Walk into the repair conversation knowing what to clarify before approving work.

How it works

Three steps to a more informed offer.

1

Enter or scan the VIN

Identify the vehicle and check for applicable open safety recalls before you spend time negotiating.

2

Inspect and connect

Follow the guided inspection and, with a compatible adapter, collect read-only OBD-II evidence from the vehicle.

3

Get your buyer report

Review codes, readiness, reset context, VIN consistency, supported live data, priorities, and questions to ask the seller.

Hardware & Vehicle Support

Works with standard $10–$35 Bluetooth OBD-II scanners.

No proprietary hardware needed. Diagnose AI connects over Bluetooth with many standard OBD-II scanners, including Bluetooth Low Energy models. It supports many vehicles sold in the United States, including most gasoline vehicles from 1996 onward and light-duty diesel vehicles from 1997 onward. Available information varies by vehicle and scanner.

Standard Bluetooth OBD-II Scanners Bluetooth Low Energy (BLE) Support
Support

Need help connecting, scanning, or restoring Pro?

Email support with your phone model, OS version, vehicle year/make/model, adapter brand, and a short description of the issue. Most adapter problems are solved by checking ignition state, Bluetooth permissions, and adapter compatibility.

Include this for faster help

  • Phone model and OS version
  • OBD-II adapter brand and model
  • Vehicle year, make, model, and engine
  • Screenshot or fault code if available
FAQ

Questions buyers and drivers ask before getting started.

Do I need an OBD-II adapter?

Yes. Diagnose AI needs a compatible OBD-II adapter to read fault codes and vehicle data from your car. The adapter plugs into the vehicle's diagnostic port.

Can Diagnose AI tell me whether a used car is safe to buy?

No app can guarantee a vehicle's condition. Diagnose AI helps you identify supported diagnostic signals, organize what they may mean, and decide when to ask more questions or get a qualified pre-purchase inspection.

Does a recent reset clue prove the seller is hiding something?

No. Incomplete readiness monitors or recently cleared information can happen for many reasons. They are useful context to ask about and, if needed, investigate with a mechanic—not proof of dishonesty or mileage fraud.

What does the buyer report include?

Where supported, the report can organize fault codes, readiness status, reset context, VIN consistency, applicable recall information, live data, priorities, and practical questions to ask the seller.

Is this a replacement for a mechanic?

No. Diagnose AI provides informational guidance to help you understand codes and prepare for repair. Always verify safety-critical issues with a qualified mechanic.

Can the app tell me if it is safe to drive?

The app can provide practical urgency guidance based on the code, common causes, and symptoms. It cannot guarantee safety. If the vehicle feels unsafe, stop driving and get professional help.

Does every vehicle show the same live data?

No. Available data depends on the vehicle, adapter, ECU support, and connection quality. Some vehicles provide more sensor data than others.

How do I restore a Pro subscription?

Open the app, go to your profile or subscription screen, and tap Restore Purchases. App Store purchases are managed by Apple.

The car has a story. You make the call.

Buying? Review the VIN, recalls, and warning signs in one Buyer Report.
Already driving? Understand fault codes, likely causes, and what to check next.