It's not just a wallet! It is mainly a bitcoin ON-Chain non custodial wallet and when you push your BTCs to the lightning network it swaps automatically through submarine-swaps. They provide you this service, but they charge 0.2% at minimum (throught their MAGNETRON node that charges 2000 PPM each forward). Then you have to make the math... for each 0.01 BTCs (1 mil sats) they'll charge you 2000 satoshis... You see how expensive it is once if you send through ONchain with 1sat/vb should cost you around 400 sats any amount of bitcoin you want to transact! In the end, you might want to choose a conventional lightning wallet if your purpose is saving on fees!