iris.to hybrid app is replacing Plebster and Amethyst on my phone these days.

Plebster: nice, but not enough features, Apple-like strange UX

Amethyst: sloooow & memory-intensive

Both are too slow in retrieving metrics. Iris is not perfect though, but the best alternative on Android for me right now. Fastest nostr client with a reasonable amount of features and sufficient UX. There's still room on the market.