Wolow is a wake on LAN app that allows you to remotely start up a computer by sending a "magic packet" request.
Simply add a device configuration inside the app, select the device you would like to start up and then press the power button and as long as your configuration is correct you can watch your computer startup.
Wake on LAN is a network protocol that is supported by the majority of Ethernet cards available. Before using the app ensure your computer is fully configured to work with the wake on LAN protocol. A guide on how to set up your computer can be found within the app at the bottom.