Most modern smartphones are moving away from the physical button in favour of no buttons, touch buttons and in one very extreme case, gesture based controls with a plethora of cameras. Dimple adds 4 tactile buttons to your device via an NFC patch. With the help of a companion app, each of these buttons have a different NFC signature so you can assign them to 4 different shortcuts. The unfortunate thing is that if you have a smartphone with a metal case, you’re out of luck.
If you’re interested, check out their indiegogo campaign on May 6th and you can pick one up for US$27