to quickly set up one or more Lightning Networks locally on your computer with just a few clicks. - Multiple node management: Easily add, start, and stop individual nodes, connect to them via RPC, and view streaming logs from each node, get root access to the terminal for each node. - Simplifies development: Allows easy creation of channels, invoices, and payments, peering, testing across node implementation versions, etc. - Polar supports LND, Core Lightning, Eclair, and Bitcoin Core.