every time I make a react-native IOS build I start praying to steve jobs

i found this on fiverr, any takers?

Frameworks for Mobile Hybrid Apps.

So we are considering to migrate our native Android app to a Hybrid because the app almost entirely consists of webviews.

what do you think will be the best choice to try.
in terms of performance, documentation, community, ease of writing and maintaining code

When I don't feel like coding today

lately, I was thinking to practice my coding with responsive front-end frameworks, I will create few demo websites templates/web applications.
any suggestion to responsive front-end framework besides bootstrap which I'm pretty familiar with.

What is you favorite front end technology?