I had mojo and wanted to use Poly so I could slip the two into my pocket and control it from my phone.
Up to that point I was controlling the mojo with an old phone velcro-ed to it back-to-backconnected with a short USB cable and running USB Audio Player Pro. It worked but it was ugly and cumbersome to use
I bought a Poly and struggled mightily to set it up with no success. I went back to the dealer and we both struggled and failed to set it up. Then the dealer pulled out her (i-)phone and said "oh, the gofigure app can be used to set it up" so I happily went into the Play Store to download it. No such app. It was only available for iOS. She could see how mad I was about that so she gave me my money back on the spot.
Now I have the Hugo 2 2go and it is working fine.
Anybody who wants a lightly-used mojo in black can have it