Diagnose AI - AI OBD-II Diagnostics for iPhone

The old way

Most scanners stop at the code.

A basic OBD-II reader can tell you that a code exists. But drivers still have to search forums, guess what is urgent, and walk into the shop without context.

You get a cryptic code like P0171 or P0420 with little explanation.
You do not know whether the car is safe to drive.
You risk paying for parts before the real cause is confirmed.

The Diagnose AI way

Code, context, confidence.

Diagnose AI turns a scan into a clear plan: what the code means, common causes, how urgent it looks, what to check first, and what to say at the shop.

Plain-English explanation

No mechanic dictionary needed. Understand the issue fast.

Urgency guidance

Learn whether the issue appears minor, soon, or immediate.

Repair workflow

Check the likely causes in the right order before replacing parts.

Product features

Everything you need after the check engine light turns on.

Diagnose AI turns complex fault codes into highly actionable repair walkthroughs, safety ratings, and budget guidelines in one sleek dashboard.

✦

Decode Confusing Fault Codes

Translate raw diagnostic trouble codes (DTCs) into complete, plain-English mechanical explanations, likely causes, and next steps.

1

Translate DTC Understand what the code actually means (e.g. system too lean or misfire) in everyday language.

2

Inspect likely causes Systematic diagnostic checks targeting vacuum hoses, MAF sensors, and fuel trim leaks.

3

DIY checks & next actions Clear checklists you can check yourself before paying for a repair shop diagnostic.

4

Mechanic-ready summary Save a clear history of symptoms, past rescans, and inspection paths for the shop.

Know the safety urgency

Get practical urgency context so you know whether the issue looks minor, needs attention soon, or should be checked immediately.

Example: Moderate - inspect soon

Prepare for shop pricing

Review estimated parts costs and typical mechanic labor hours to prepare your repair budget and avoid mechanic overcharges.

DIY parts$12-$45

Shop labor0.5-1.5 hr

ComplexityLow-Med

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Digital Fleet Garage scan histories

Track active fault histories, cleared diagnostic alarms, and maintenance sensor logs across all your household vehicles in one organized hub.

Honda Civic Sport Healthy scan · No codes

Toyota Camry XLE P0420 · Catalyst below threshold

Ford F-150 Lariat P0301 · Cylinder 1 misfire

How it works

Three steps from warning light to action plan.

1

Plug in an adapter

Connect a compatible OBD-II Bluetooth LE adapter to your vehicle's diagnostic port, usually under the dashboard.

2

Scan from your iPhone

Read fault codes and available live data from your vehicle, then save the scan to your private history.

3

Get your AI report

Review likely causes, urgency, repair steps, estimate ranges, and a summary you can bring to a mechanic.

Compatibility

Designed for supported OBD-II adapters.

Diagnose AI is built for iPhone and compatible Bluetooth LE OBD-II adapters. Adapter behavior can vary by brand, firmware, vehicle, and available sensor data.

iOS Bluetooth LE OBD-II DTCs Live data where available Vehicle profiles Scan history

Privacy

Your data should not feel mysterious either.

The app is designed to keep your account and diagnostic history private while sending only the vehicle context needed for AI analysis.

Secure account authentication
Private scan history tied to your account
No personal email included in AI prompts
Account deletion available by request

Support

Need help connecting, scanning, or restoring Pro?

Email support with your iPhone model, iOS 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.

Email support Read FAQ

Include this for faster help

iPhone model and iOS version
OBD-II adapter brand and model
Vehicle year, make, model, and engine
Screenshot or fault code if available

FAQ

Questions drivers ask before downloading.

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.

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.

Legal and privacy

Clear policies for App Store review and customer trust.

Privacy Policy

Effective Date: May 24, 2026. Last Updated: May 24, 2026.

Diagnose AI ("we", "our", "us") is committed to protecting your privacy. This policy explains what information we collect, how we use it, and your rights.

1. Information We Collect

Account Data: Your email address used only for authentication via Supabase Auth. Passwords are never stored in plaintext.
Vehicle Profiles: Year, make, model, and engine type you provide to improve diagnostic accuracy.
Diagnostic Data: OBD-II fault codes retrieved from your adapter, stored in your private cloud profile.
Usage Analytics: Basic, anonymized session data used to improve stability. No personally identifiable information is included.

2. How We Use Your Data

To authenticate your account and display your personal scan history.
To pass anonymized fault codes to AI APIs for generating repair guidance.
To manage your in-app subscription through Apple and RevenueCat.

3. AI Processing

Raw fault codes and anonymized vehicle context are securely sent to Google Gemini AI for analysis. No personal data such as email, name, or user IDs is intentionally included in AI requests. Your data is not sold for advertising.

4. Data Security

All communication between the app and our servers is encrypted with TLS. Our Supabase database enforces Row Level Security so users can access only their own data.

5. Third-Party Services

Supabase: Authentication, database, and Row Level Security.
Google Gemini AI: Anonymized diagnostic code analysis.
RevenueCat: Subscription and purchase management.
Apple App Store: Payment processing for in-app purchases.

6. Data Retention and Deletion

You may delete your account and associated data by emailing team@diagnoseai.app. Upon request, your data will be removed within 30 days unless retention is required by law.

7. Children's Privacy

Diagnose AI is not intended for children under 13 years of age. We do not knowingly collect data from children.

8. Contact

For privacy questions or data deletion requests, contact team@diagnoseai.app.

Terms of Service

Effective Date: May 24, 2026. Last Updated: May 24, 2026.

By downloading or using Diagnose AI, you agree to these Terms of Service. If you do not agree, do not use the app.

1. Description of Service

Diagnose AI is a vehicle diagnostic assistance application that reads OBD-II fault codes from a compatible adapter and uses AI to provide informational repair suggestions.

2. Disclaimer of Liability

AI-generated repair suggestions are informational only and may not identify all causes of a fault code.
Diagnose AI, its developers, and affiliates are not liable for vehicle damage, personal injury, or financial loss resulting from actions taken based on the app's output.
Always consult a qualified mechanic for safety-critical repairs such as brakes, steering, airbags, and similar systems.

3. AI-Generated Content

Results are generated by third-party AI models and may occasionally be inaccurate, incomplete, or out of date.
You must not rely solely on AI output for any safety-critical vehicle decision.
You agree not to use the app to generate, distribute, or store illegal, harmful, or offensive content.

4. Subscriptions and Payments

Pro features may be available through an in-app subscription processed by Apple.
Subscriptions renew automatically unless cancelled at least 24 hours before the renewal date via your Apple ID settings.
Refund requests must be submitted directly to Apple at reportaproblem.apple.com.

5. Account Responsibilities

You are responsible for maintaining the confidentiality of your account credentials. You agree not to share your account or use another user's account without permission.

6. Termination

We reserve the right to suspend or terminate accounts that violate these terms, abuse the service, or engage in fraudulent activity including attempts to exploit subscription systems.

7. Governing Law

These terms are governed by applicable law. Any disputes will be resolved through binding arbitration or in the jurisdiction where the company operates.

8. Changes to Terms

We may update these terms occasionally. Continued use of the app after changes constitutes acceptance of the revised terms.

9. Contact

Questions about these terms? Email team@diagnoseai.app.

Ready before the repair bill?

Turn your next engine code into a clear action plan.

Download Diagnose AI, connect a compatible OBD-II adapter, and get plain-English repair guidance from your iPhone.

Get the iOS app

Decode your check engine light before the repair bill.