At the base of the software experience on the Nothing Phone 3a is of course Android 15, but it’s Nothing OS 3.1 which provides some key differentiation for this device. Nothing’s homegrown user interface is a bit of a wildcard, and indeed many people might find the changes a bit too jarring. I personally quite like the look and feel, and the added features that come with it.
The special icon set and customisation themes look good, and add a sense of adventure to this phone. You may not immediately recognise some of the icons, but you’ll get used to it eventually. There are also lots of customisation options, and important elements of the software package are where you’d expect to find them on an Android smartphone; there isn’t too much change for the sake of change when it comes to the basics.
Coming to the special features which I promised to get back to - the Glyph interface and the Essential key. The former is the next step in a familiar feature set on Nothing smartphones, and comes with some useful touches in addition to the basic flashing lights when your phone rings. You can also view things like timers and volume levels on the Glyph lights when your phone is face down, get some neat visualisation for your music, and more.
The phone can also be set to activate silent mode when flipped over, letting you rely on the lights for notifications. Of course, all of this relies heavily on your actually flipping the phone face down often, and this isn’t something I do much. Still, it could work for many, or is something you could get used to for the sake of using the feature.
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The Essential key, on the other hand, is Nothing’s play at AI. Pressing the button on any screen takes a sort of screenshot which can be saved to the Essential space (an app made for keeping these), and you can also add voice or text notes to go with it.
Inside the Essential space, you get a quick Gemini-powered AI scan of the contents of the screenshot, which summarises stuff on screen. You can also press and hold the button to quickly record voice notes to save to the Essential space.
Interestingly, the Essential space also now comes with the ability to work with your camera, to capture images and save them directly to the space. This works well to save visual notes for yourself, and once saved the AI functionality can give you additional inputs based on your note and the details in the image itself. It's niche, but I can see the use cases.
It’s great for quickly saving ideas, voice notes, and audio clips along with getting a bit of AI summarisation with it, but I kind of wish the button was customisable in function…