A while back, me and my brother worked on a similar idea (never made it to launch). I'm happy to see that someone was thinking the same thing and actually did it.
Would be nice to have like a demo video, it would answer some questions for the users.
For example, how does one enter the data (spendings and incomes)? Can you make recurring payments? Does it also make estimations for future months (helps also with yearly estimations)? Can you scan receipts? Do you have the ablity to store a list of products (like a database, for people that want to go into a more detailed approach)?
I know this project is in it's first phase, so worry about the amount of questions.