Now I can pretend the singing robots are real
I thought the app only had Miku, but there's pretty much every single popular vocal synth character, as well as a lot of Miku's project diva modules(?) and Akita Neru (although I am going to admit miku's model still looks the best in my opinion). It has quite a bit of options and is generally fun to play around with. Best part is, no in-app purchases!