I use Wealthfront Cash account and I would HIGHLY recommend them because it's technically not a savings account so you can withdraw as much as you'd like (even have a debit card for the account). BUT it matches or surpasses interest rates on most accounts, is FDIC insured like any savings account should be, and has a really nice UI and other nice features.
I think the app interface is really nice too because it allows you to link all of your accounts and track your assets/debts in one place. You can also get a debit card for the account if you really want access to your cash immediately at any time.
One downside is that they don't have Zelle. Not too big of a deal for me but I had a friend who paid rent through Zelle. I keep a separate low balance account elsewhere just for Zelle access.
Use this link to sign up for a Wealthfront Cash Account and we'll both get +0.50% on the current APY!