how do i create an app that when you take a picture of anything it links you to a store that has the exact same thing or offers such a service.
Google lens the Gemini assistant using a gemma core and the Google lens attachment to Make a default camera app that runs off the Google server. Gemini will give you the details.
You could probably even just take a picture and then share it with Gemini and ask about whatever you’re interested in that you take a picture of and what it can find on the internet about it.