It is, but its big advantage is aftermarket software support.
GrapheneOS in particular only supports pixels due to their security features, and is (almost) entirely disinfected. It’s about as private as you can get without resorting to a Linux phone or pager.
I use a spreadsheet. When I need to budget, I download my transaction history as a CSV and a couple of simple sumif formulas give me all the info I need.
I’m not aware of a good FOSS solution software-wise and frankly I don’t want my entire financial history to be accessible to a data mining firm.
Should I buy a Fairphone? If not, what SHOULD I buy and why?
What system or method do you use for your monthly budget or personal finance?
What budgeting advice do you recommend? Money management method?