For many, the prospect of "inbox zero" seems impossible – the unicorn of modern communication. Mailbox understands this struggle to stay atop the constant deluge of digital correspondence, and sees the problem not as a matter of personal effort, but rather perception. As such, rather than resemble typical mobile email options, Orchestra's new iPhone app takes its inspiration from the to-do list, challenging users to clear their inboxes like checking tasks off when completed, with a handful of breezy actions used to facilitate the process.

When you think about it, the calendars on our iPhones aren't all that different than the ones that hang on our walls. Sure, we can set alerts for 2037 and fit much more than we can on those impossibly small squares, but for the most part, digital calendars haven't brought much new to the game. Horizon Calendar might not be a revolutionary change to mobile calendaring, but it's a good start. Its fresh, clean interface puts your events front and center with color-coded appointments and locations, and best of all, weather reports.

A sense of mystery can be a strong force that connects you to a place. Kairo relies heavily on mysteriousness, and a thick layer of atmosphere too, to draw you deep into its minimalistic realm. For such an empty place, the blocky architecture and dark corridors hold a lot of intrigue. Who built them? What happened to the people here? Why am I here? These and other questions pop up as you explore and solve abstract puzzles during your colorful trek through this desolate landscape. It's a journey that's strangely compelling, despite a distinct lack of excitement.