At launch, Flow is said to offer support for more than 30 applications, including popular ones like Final Cut Pro X, Photoshop, Premiere, SoundCloud, Spotify and YouTube. With Spotify, for example, you could set up Flow to skip tracks by simply making a swipe gesture over the device, among other things.
Right now, most of Flow's information points to the peripheral being used with desktops or laptops, but the company does note that there could be support for mobile applications in the future. The Flow Indiegogo page appears to be doing really well thus far, so be sure to check out the crowdfunding page if you want to see this get made.