I would like an application that warns me when I am near hospitals or let's say parks(under 5 min walking distance) in notifies me. Assuming this generalization is feasible, what type of app would I need? iPhone would be the best. I'm in the USA. The price of all needs to be under $100. I have a battery case on my phone so battery length isn't an issue.
Its okay if I have to program the locations in manually.