Venmo is evidently popular for interpersonal transfers. I haven't used it, but then again I'm right on the "Venmo line:" http://qz.com/277509/read-what-happens-

Venmo is evidently popular for interpersonal transfers. I haven't used it, but then again I'm right on the "Venmo line:" http://qz.com/277509/read-what-happens-when-a-bunch-of-over-30s-find-out-how-millennials-handle-their-money/ http://qz.com/277509/read-what-happens-when-a-bunch-of-over-... (TL:DR; effectively everyone at QZ under the age of 30 is using Venmo regularly, and those over 30 are kind of baffled.)