Mobile app development without SUP and Mac

Hi,

Sorry for the disturbance but I am new in the SAP Mobility solution. I have searched for it but i got more confused. I have three main questions:

1- Can I develop mobile applications without SUP? I have found different keywords related to this topic but I couldn't figure out the difference between them and how the development process will be done, the keywords were oData, REST web services, Gateway

2- I found that there are 3 types of applications using SUP: Native (offline application), Hyprid (online app), oData (online app). can all of them connect to SAP EIS? and if yes, what is the difference in this case between Hyprid and oData app?

3- If I want to develop iOS app, should I have MAC or is there any other possible way to allow me to only use my Windows machine?

Thank you in advance