Car owners and small repair shops often struggle with expensive dealer-only diagnostic tools. A mobile app that reads and clears codes for specific car brands would fill this gap.
Focus on less mainstream brands first where competition is lower. Partner with enthusiasts to test and refine the tool.
Charge a one-time fee or subscription for advanced features. Upsell OBD-II adapters as hardware add-ons.
Start with basic code reading for one brand, then expand. The biggest risk is legal pushback from car manufacturers.