fintech ... what's your choice?

nerdwallet, cashapp, circle, square, venmo ... what am i forgetting? you guyz like any of this stuff? i downloaded venmo but hardly know how to use it, contacted a few people but got no response. i mostly just do online stuff with my regular credit union.

oh yeah, google pay, apple pay, amazon app?(don't even know what they have)

not really in the game yet with this stuff, any recommendations?
peace