You don’t need a Raspberry Pi—your old Android phone is more powerful and can do the same things for free

A Raspberry Pi 4 or 5 costs anywhere from $60 to $100 dollars before you even add a case, power supply, or storage. Meanwhile, your retired Android phone has all of that built in, including a battery that functions as an uninterruptible power supply during brief outages. With the right software, it can replace a Raspberry Pi while costing you nothing.