The web based Mastodon-client @pinafore is just as good on the phone as it is on the computer. It's lightweight, clean and a joy to use.
One of my favourite features with Pinafore must be the wellness settings. I really like that it supports pagination to prevent endless scrolling.
The only thing I miss is support for multiple accounts on the same server. :)
Fosstodon is an English speaking Mastodon instance that is open to anyone who is interested in technology; particularly free & open source software.