For me, it was simply a "snapcash" entry in the settings screen in the snapchat app. You click it and put in your payment info before you can use the feature.

For me, it was simply a "snapcash" entry in the settings screen in the snapchat app. You click it and put in your payment info before you can use the feature. I'm on the Android app though, I heard from coworkers that the iOS one doesn't have it yet.