Hi Martin,
I hope all is well!
We have excellent team of .Net developers with 7+ years of experience and i am quite certain, that we will defiantly build this app in 12 working days. I have already added you on skype and i can see you are online, please feel free to ping me on chat. Just for information we already have more than 100 apps live in google play and itunes store.
Thanks
Vick
Skype: vick,enterprisemobility