I'm absolutely new to this, so i was wondering what is legal and what isn't.
Say, for example, i want to make an app that finds grocery stores near your location, retrieve the open hours somehow (probably from google?). I figured this, if not legal, is totally acceptable? There's no harm done here.
But what about taking more private information from the store, ie - retrieve it's goods prices, compare them to other stores and so on?
What about using pictures from the store's website to represent it? (logo, goods, etc)
What about an RSS feed? Can i just take a feed i found on the web and "steal" it's information to put it in my app?
And so on.