I usually keep older phones that get replaced after 2-3 years so they can be used for similar projects.  The most basic are just glorified remotes for all of the various controllable things in my house.  Get a wall mount&#x2F;charger and they make good switches for Hue lights, controllers for casting audio to various rooms, and stuff like that.<p>In the past I&#x27;d see low end devices for $50 or less but $10 is honestly hard to believe.  Even if all you use it for is a handful of desktop widgets that turn things on&#x2F;off that&#x27;s already cheaper than some <i>regular</i> remotes and switches, much less ones that give you information and can be customized to look however I want or perform different tasks.