First of all I apologize for answering my question, with another question but I did not know whether to open a new topic or put it in this already mine.
Extirpater is only intended to be used when you stop using the phone or selling it, it should not be used continuously as this will reduce the life of the memory, caution!
If you want to know what it is and how to use it, just read → Divested Computing Group / Extirpater · GitLab
No alternative for encrypted SMS, sadly, Silence is outdated tho.
About Silence it is a pity that it is discontinued since a long time ago. I love application for encrypted sms. And I don’t see any that resembles it. Or those I saw are Telegram or Whatsapp style. And I do not want to chat.
A hug and thanks a million for your help and time.