BlueWallet because it gives you on-chain and you can add Lightning instantly with an LNDHub wallet such as Alby or LN.tips.
Discussion
I personally love bluewallet. Especially because I run my own LNDHub
Pheonix let’s you run a lightning node on your mobile phone. But the on chain fee to open channels is a bit of a booger.
Also, you could checkout lifpay. It’s a million percent custodial though
Zeus is a better Lightning wallet if you’re running a node, but I usually recommend BlueWallet to people who want a solid starter wallet that can do both self-custody and Lightning.