iphone reminder app required

hi, we need copyright and source code for this app. we need : 1 : set this app in app store with our name. 2 : GUI - good gui required from developer. 3 : we need reminder. suppose we have two person ram and shyam and ram want to talk to shyam and ram send him reminder for 2 PM then reminder goto shyam and if shyam accept that then it show in our app that shyam is ready to talk to you on 2 pm. if unfortunately ram or shyam want to make this call at 2.30 instead of 2 then reminder again goto and if accept then show re-scheduled to 2.30. 4 : reminder setting required that in before15 min or before 30 confirmation sent to both and if both accept then our phone give us reminder and option for making the call to that number and after call we again set the date and time for next meeting if we want. 5 : if we dont want to make the call then it give us reminder and make bell and we confirm - is it done or not if not then cancel or re-schedule. 6 : this app also use microsoft calender also for schedule / re-schedule / reminder for PC, for example we use Android and we want to sent invitation to email for meeting or work then our invitation goto that email and confirm us on our calender. for example we are already using iPhone calender and it has this facility but we need more simple. we need demo first before award. thanks.