Lewis: AI OBD2 Car Scanner
Check Engine Light Diagnostics
About
This app connects to your car via a Bluetooth OBD2 adapter to diagnose issues in plain English. It uses AI to analyze trouble codes, provide severity ratings, and offer maintenance advice. You can also monitor live engine data and track your car's health over time.
What's New in Lewis
1.1.8
November 5, 2026
Security improvements. Thanks for driving with Lewis!
Subscriptions & In-App Purchases
Lewis Annual
Lewis Pro Annual Subscription
Developer apps
FAQ
What cars does Lewis support?
Lewis works with any 1996 or newer vehicle that is OBD-II compliant. It connects via any standard Bluetooth OBD2 adapter. Extended diagnostics are available for select makes like Alfa Romeo, BMW, Audi, and Mercedes, with more planned.
How does Lewis's AI work?
Lewis uses advanced AI to analyze your car's scan results. It considers your specific vehicle, past scans, and known patterns to provide severity ratings, likely causes, and recommended next steps, offering a deeper understanding than just code definitions.
What features are free in Lewis?
The free version of Lewis includes full OBD2 scanning and code reading, DTC descriptions with severity ratings, live engine data monitoring, and access to your scan history. This allows for basic diagnostics and monitoring.
What are the benefits of Lewis Pro?
Lewis Pro offers unlimited AI scan analyses, full AI chat capabilities to ask anything about your car, trend analysis across all your scans, the ability to manage multiple vehicles, and access to extended vehicle readings for deeper insights.
How often is Lewis updated?
The latest version of Lewis is 1.1.8, and it was last updated on November 5, 2026. Updates typically include new features, bug fixes, and expanded vehicle support.
Is Lewis safe for all ages?
Lewis has an age rating of 4+, making it suitable for a wide audience. The app focuses on providing technical information about vehicles.
What is the pricing for Lewis Pro?
Lewis Pro offers two subscription plans: Lewis Monthly at $12.99 per month and Lewis Annual at $69.99 per year. These plans unlock advanced AI features and extended vehicle data.
Does Lewis have ads?
No, Lewis does not contain advertisements. The app is free to download and use with basic features, with an optional subscription for advanced functionalities.
