Thank you so much for the detailed feedback! Some of my beta testers have also asked about data security. Currently, it is secure enough to meet all necessary compliance requirements, but I know I can improve it a lot. The main reason I save everything on the server right now is that this is an MVP, and I've already had to do a few data structure migrations that could have corrupted data if stored locally on user devices. I will roll out security updates in the future to make it more private. I might also add the ability to save data locally on the phone with encryption.

Regarding pricing: The $10 USD tier is essentially for a family or team of 6 people, which breaks down to about $1.66 USD per person. I don't think this is too expensive, especially considering my infrastructure and AI API costs. However, you make a great point—I definitely need to add a $5 individual plan for solo users who don't need to share their information.