The battery's shot, the screen's cracked, the OS is three versions behind — doesn't matter. It doesn't need to run apps. It just needs to load one web page and stay plugged into the wall, forever.
Home Audio Sync isn't an app you download. It's a web page. That means it doesn't care if the phone is running iOS 10 or Android 6 from a decade ago — almost any device that can still open a browser tab can become a speaker.
No pairing, no setup screen. The moment the page loads, it lands in your room list with its own name, volume slider, and play control.
Leave the phone permanently connected to power in the garage, workshop, or bathroom. Dead battery becomes irrelevant — it's a fixture now.
Four old phones aren't clutter — they're four rooms of sound waiting to happen. Every device you rescue is a room you don't have to wire, drill, or pay a technician for. And every one plays in perfect sync with the rest of the house.
No jailbreaking, no custom firmware, no soldering. If the phone still turns on and can open a web page, it qualifies.