I'd argue Muun is pretty nice. Knows an exact fee for a Lightning TX before you make it.

This project https://bitcoiner.live by bitbug42 shows a clean table. There is a detailed explanation about how the estimation is done on the site.

I use https://mempool.space/ for that, because you have all the relevant information like how the mempool currently looks that let's you better estimate the fee you want to pay depending on your needs, and you don't just get some blank fee estimates. Works absolutely perfect on mobile as well as on desktop.

Definitely Mempool. It looks nice on mobile devices and gives enough information (also well structured). Bitcoiner live looks like something you will use in accounting.

mempool