This app was mentioned in 3 comments, with an average of 1.00 upvote
As a University student I'm using MoneyControl Expense Tracking. I even got the pro version after my workplace colleague recommend it. It's very simple and mainly show you the monthly profit/loss and that's more than enough for me.
I didn't know about ynab until I saw the comments. It looks interesting. I think I'll switch to that when I'm working with a steady pay and have bill to pay.
Durante años usaba un spreedsheet pero muchísimo menos elaborado que los que mostraron por acá, y hace un tiempo que estoy con esta app que es multiplataforma y la uso tanto en el celu como en mi desktop (windows 10) y anda bárbaro. Tenes que pagar para desbloquear algunas funciones creo. https://play.google.com/store/apps/details?id=com.priotecs.MoneyControl