You need your own wallet with damus, I saw nostr:npub1xtscya34g58tk0z605fvr788k263gsu6cy9x0mhnm87echrgufzsevkk5s hinting at a native wallet someday, but as of right now, you need to run your own or use a third-party custodial like strike.me or speed.app… I know there are more but those are the only ones that I know are free. And zaps are tipping with satoshis or the lowest denomination of bitcoin