People want meal planning tools that don't require accounts or store data externally. A local-first app with automatic cookie storage meets this need.
Build a simple interface for planning meals with recipes and grocery lists, storing everything locally.
Users would pay a one-time fee for the convenience and privacy. A subscription could offer cloud sync as an optional add-on.
The MVP could be a basic meal planner with a few recipe templates and local storage.
The risk is competition from free, cloud-based alternatives with more features.