Suggestions are highly appreciated
I would suggest you Xamarin, React Native, jQuery
For cross-platform, I would suggest React Native, Flutter. React Native is still good with large community but Flutter is on trend.
Apologies @BeyondRoot, but I’m closing this thread. Your question is far too broad, and you’re either going to get people listing random frameworks which may not be even related to mobile development (which are the replies that haven’t been deleted) or spammers (which are the replies that have been deleted). Please be a bit more specific about what you want, and what you already know. There isn’t a “best” technology, it’s dependent on context.