While I could access Actual Budget on my desktop no problem, I couldn't get it to sync again on my phone. It kept throwing an error message. Eventually I just exported the data and re-imported on my desktop and that ended up syncing fine on the phone.
I've got all my March activity and budget set up. Not fun but it is my day job so an hour or two of persistence was enough.
I'll need to see how the web app behaves on my phone without a connection to the server, but I suspect I probably don't care either way.
Really unfortunate I renewed YNAB a month ago.