Types of SAP Mobile Technologies

Hi,

I am new to SAPUI5 and very much interest to learn SAP Mobile technology.

I am currently searching for which one is best like SUP, SAPUI5 and etc..

Please let me know which SAP Mobile technology is better and simple to develop the app.

What exactly are the differences among SAP SUP, SAPUI5, Neptune, & PhoneGap.

As per my understanding PhoneGap is a framework where we can develop hybrid applications irrespective of mobile platforms.

Please let me know how can I start my SAP Mobile applications.

Thanks & Regards,

Chandu V