npub1j46f9va5qdrmamcwmncew7g8mwekgma386dhws6k04fsnlkqpcpsj23gm7 (npub1j46…3gm7) https://thesession.org should prompt you to install (on mobile or desktop). If not, I also encourage people to do it by linking to this page from the homepage:
https://thesession.org/app