Hi Maria. This is a great idea. I think that looking at grandma's ideas and experiences is a great way to keep traditions alive. I have a similar concept in the Healthy Traditional Food Network idea. It's important to involve the younger generation to make sure the experiences are passed on and saved. I'm wondering how the App might work across different types of devices - especially non-smartphones. What sort of platform are you thinking of creating that might be able to cope with this?
You are right that we lose so much between the generations. I think we carry a lot of our food heritage around in our heads and we learn by watching in many cases. Not a lot gets written down and so great ideas for food gradually disappear.
I like your idea for the Apps and the idea of a virtual community centre - A good way of sharing and perhaps ending isolation for some community members.