Horizon is an interesting little app that comes from a very simple idea: To combine your weather report and your calendar in one place. That may not sound like a big innovation, but it's actually not a bad one. Horizon's simple and straightforward design (put together by a young developer named Kyle Rosenbluth) makes browsing through your upcoming schedule very easy, and matching up outside temperatures and weather with what you're doing is more helpful than not.
You can use Horizon as its own calendar app, or sync it up with any of your other shared calendars, including any you have available over iCloud. An
