I'm in the US Monzo beta. The app is super solid, has envelope budgeting features, can automatically divvy up your paycheck like Expenses. Hoping they open up invites before Simple shuts.
They've been my main bank for a number of years, and I second this.
The APR on their savings account is generally either the best or among the best available, and the small handful of times I've had to call their customer support, they've been a pleasure.