I want an app that uses the concept of what3words that breaks the globe up into 3x3 meter squares. I want that to equal 100% and then every square your phone enters turns that square green (opaque) and let it reflect in your total percentage. I want people to be able to check their "completion" of squares by zip, city, state, country, continent. I also want a leaderboard by those same parameters. It needs to be clean and work perfectly. I want a filter that differentiates between walking vs driving vs both. The winner will use the city of Winthrop, MA 02152 as an example, with a focus on Deer Island more specifically. The winner MUST be able to provide the following: all files to submit to the app store including screen shots and written info. The winner MUST be able to actually present the most simplistic way to sign up that exists as well as the ability to share within contacts. One last disclaimer: this app should work as anyone would expect an app to work. It needs to be lightning fast and accurate and work around the entire globe. Any attempt to ask for more money or ask me to pay in any way other than the freelancer format will be immediately reported and you will not get paid. I don't mind putting my money up and I am very easy to work with, but I don't want any scammers.