iOS: There are plenty of great calendar apps out there, but Horizon 3 takes a different approach than most. Instead of relying just on scheduling your day, Horizon 3 also brings the weather forecast to the forefront so you can get a better view of what to expect.
Horizon 3 does everything you need a calendar app to do. You can check out your upcoming calendar in various views, input new events with natural language, and easily see how busy your days are with a colour-coded view. You can also see when you're free by searching Horizon for terms like "next free lunch". Each event also has a weather note attached to it as well, so you can quickly see what type of weather to expect for whatever you're doing.
Horizon 3 (Free) [iTunes App Store]