I was forced to ditch Simple after their ridiculous application policies wouldn't allow my spouse to create an account for us to have a joint account. Since doing so, I've signed up for YouNeedABudget (YNAB) [1], and couldn't be happier. Simple was a great service and I'm sad it is calling quits, but I've outgrown it.
[1] https://www.youneedabudget.com/