I'll just throw in an extra 1up here. I am a very happy customer of Lunch Money. It's the only app I have ever stuck with for any amount of time.

It is still early days for the product, bur it is rapidly improving and the creator is very good and communicate. The couple of times I have requested support (mostly for feature suggestions), she has gotten back to me very quickly.

Out of all the services listed here, yours looks the best. I’ll try it out once I start my new gig in a month.