Two screens from the Jays headset control app for Android.
By default, the Jays app is set to easy mode, where a single click will launch the default music player on your phone and play a song; a double click will skip a track; and a click-and-hold command will increase the volume to the ear buds. Even better, though, is that the app has an advanced mode, allowing you to assign your own, more complex commands. You can introduce a triple click and hold, for example, and can switch around of the basic commands to whatever you prefer.
Of course, apps are nice, but it's really on audio quality that we judge headphones, and in this all-important metric the One+ 'phones score a solid pass. Bass reproduction is decent without being overpowering, and high tones are acceptably sharp. It's in the mid tones where we hear the most fuzziness, but so much that it detracts from a good track. It really does take a side-by-side comparison with a better (and more expensive) pair of headphones to identify the weakness in this sound.
We also came away wishing that the noise isolation was better in this unit, too. With the correct-sized ear-bud gel, the One+ does a good job of blocking out external noise, but it's not 100 per cent when used in noisy places, like on public transport. This goes both ways, of course, so be sure to leave the volume at an appropriate level if you don't want grandmas shooting you death stares on the bus.
The a-Jays One+ headphones deliver a good sound for their comparatively inexpensive price, and offer a nice bonus for Android smartphone owners.