I've used ChompSMS (https://play.google.com/store/apps/details?id=com.p1.chompsm...) for the past 10 years or so, side-by-side with Signal. I prefer keeping secure messaging and insecure messaging separate.

Thanks!

Personally like TextraSMS. Has a free ad-supported version, but I paid to remove ads when it was on sale several years ago (maybe $1).

4.4 stars. I believe it's $3 or $5 to remove ads now.

https://play.google.com/store/apps/details?id=com.textra

Further — can anyone recommend a good Open Source SMS Android app? The only ones I can find are AOSP Messaging and Simple SMS Messenger, both of which are "Okay".

QKSMS is so good I almost forgot that I am using it.

https://f-droid.org/en/packages/com.moez.QKSMS/

Ah, nice, thanks. I didn't see it in my initial F-Droid search.

None will do RCS so you basically have to use Googles

Why would I care about RCS? 100% SMS I receive from carrier, airline, delivery company, doctors, etc. are all plain regular SMS, not even MMS.

Heck I can't even use Google Messages in my phone without gapps.

I like the default messages app.