Looks like nostr:npub12vkcxr0luzwp8e673v29eqjhrr7p9vqq8asav85swaepclllj09sylpugg no longer lets users connect their NWC wallets to send zaps on iOS. 😟 You can do it on Android, though.

On desktop Alby Extension is used to send zaps via Primal.

You can use getalby Lightning Address (naturally) for receiving zaps.

Does Primal ask for another app to pay the zap or not?