It's been good recently. I still don't know how to do it easily on Amethyst though.
Discussion
It's so easy. You tap the zap icon, select your customizable zap amount, and it gives tge the option to send from a list of all your wallets. Choose a wallet and it will open, hit send. ⚡
I just use WoS and send like 1k sats there at a time. Not a fan of keeping my money on a phone so I don't care if the wallet is custodian or not. It's a play-money wallet.