Jquery mobile is fastest to learn and quickest to implement. I used jquery mobile to built my offline quran app.
I learnt it quickly and completed the interface within a month. I did this in 2013.
I was expecting it to become popular and have more traction. But there are other JavaScript frameworks that overtook jquey mobile in the race. Right now, i am not planning to migrate my web app to other trending mobile ui framework. I am happy with jquery mobile.
Jquery mobile pages and widgets are responsive across many devices. It works in both desktop and mobile phones. With jquery mobile with single code, we could be responsive in both android and ios phones. Jquery mobile is write once and runs every where.