Only one update can be active at a time. However, the increments can be changed as many times as you like. Before swiping an ATM card, make sure that the impulse you are applying is active. How does boost work on cash app to open Boost, follow the instructions to see how Boost works in a POS app. To see this: Tap the "Payment Card" tab on the home screen. However, open the Cash Cards tab to find out how to unlock the various accounts and visit website.