Developed in .NET for PDA when iPaq ruleed supreme. Robust and tested. Requires conversion to iOS App. .Net source code available. Medical App that allows doctors healtcare professionals to maintain and share patient data using mobile devices. IThe iPaq Medicmate can be viewed 

https://www.youtube.com/watch?v=MTLSaISXnVE

and 

https://uk.search.yahoo.com/search;_ylt=A9mSs2qSJzRVAioAktpLBQx.;_ylc=X1MDMjExNDcxNzAwMwRfcgMyBGZyA21jYWZlZQRncHJpZAM2Zlg5M2ZhVlJHV1VZVmZwN0EublFBBG5fcnNsdAMwBG5fc3VnZwMwBG9yaWdpbgN1ay5zZWFyY2gueWFob28uY29tBHBvcwMwBHBxc3RyAwRwcXN0cmwDBHFzdHJsAzE3BHF1ZXJ5A1lvdXR1YmUgbWVkaWNtYXRlBHRfc3RtcAMxNDI5NDgxMzg1?p=Youtube+medicmate&fr2=sb-top-uk.search&fr=mcafee&type=B211GB649D20130413