There are plenty of smart devices you can control using your iPhone these days. Don’t want to upgrade all your gadgets? You can still control them using a Tethercell. It lets you turn AA-battery-powered devices on and off remotely. You can set up schedules and timers for your gadgets. The device alerts you when you are running low on battery.
Tethercell is pretty easy to set up. Just remove a single AA battery from the device you want to control, add a Tethercell, and you are set. The companion app for it is compatible with iOS and Android devices. Like what you see? You can get one for as low as $27.[where to get it]