I use HomeBudget which seems to be most similar to YNAB which I’ve never used.
It’s all manual entry, but it’s free (or £4.99) for the full version and I’ve been using daily for over 18 months.
I like the aggregators such as Emma, but I find this useful, particularly to include household bill trackers like Acasa (formerly splittable) to include money I owe or money owed to me with housemates etc.
It also enables me to include investments etc, to get a full picture.
Found the manual entry tedious at first, but have definitely benefited from seeing the full picture of where my money goes.
Think I got into it initially out of frustration with split bills or payments skewing my Monzo targets and spent today figures
HomeBudget Lite (w/ Sync) by Anishu, Inc. https://itunes.apple.com/gb/app/homebudget-lite-w-sync/id307620907?mt=8
HomeBudget with Sync by Anishu, Inc. https://itunes.apple.com/gb/app/homebudget-with-sync/id306257910?mt=8