Brazil's government-run payments system has become dominant

I'm a Brazilian. Everything here can be paid through pix. It's very convenient, fast reliable and, for a country like ours where walking on the streets with money is a risk, safe.

There's only one reason I don't use it: there's no FLOSS app (AFAIK) to use it.

Something as common as the dominant payment system should not depend on proprietary software.

> Something as common as the dominant payment system should not depend on proprietary software.

Name one dominant payment system worldwide that doesn't? Banks are proprietary, credit cards are proprietary, paypal, crypto is all proprietary.