Hi guys, I'm the cofounder/ceo of DITTO. Glad you guys like it! Put it on here to get to get some feedback so please let me know if you have any other comments/suggestions. FYI: We tested everything from dollars to cards for the scale and cards tested much higher and people usually have them handy. Also we did test not forcing an account but the emails we get are valuable enough to lose some people. Thanks again for the helpful feedback!