Oh man, I am still annoyed about Signal removing SMS support. Had to add another app to my phone and I can now no longer accidentally discover that someone I'm texting has Signal, which happened more than once to me!
org.thoughtcrime.securesms
So yes, they're still called 'secure SMS' even though that is no longer part of the deal.I'll only use it for the specified purpose since I far prefer my own XMPP server with OMEMO encryption - which is based on the same 'double ratchet' keying as Signal uses.