I'm curious: what was your problem with Google Forms?
Our form has more questions than cashew (day of the expense if not today, amount, category, recipient, description and spender), but could easily be made shorted, so it could be a 4 step process :
- Touch shortcut
- Enter description
- Choose category
- Enter amount
- Click submit
I've been using my own Google Spreadsheet for a few years now, and it would really be hard to switch to something else, not because of Forms, but because it works the exact way I need and if something is missing, I can easily add it. It is also mostly technology agnostic, so I could easily move it to Excel or LibreOffice. I'd have to rewrite part of it in order to get back live currency exchange rates and stock data though.