finish iOS api functions, create same app for Mac, windows and google play.

app is simple needs some api functions fixed the same app I have built in iOS needs a google play, windows and Mac version. need this done asap!!!! ( note: the api functions connect to a device, I have the device and all testing will have to occur on my end. I have gone through several freelancers saying they could do this and had no idea what they were doing if you cannot do it please be honest.