Being there is no all inclusive nostr app. I use several. Because you kinda have to.

Plebstr

Spring (has all nostr apps. It's a nostr browser)

Nostrmo

Freeforum

Snort

Iris

Current

There is also

Nozzle on github

Nostros fdroid

Yana github also on the spring app

Daisy - github don't know if it's been updated recently

Lastly

Look up in Google " Awesome nostr github" it'll be one of the first links from github. Save it, it has all the apps and nostr resources you can reference back later