Zetagram

We went on an aquarium date, and after exchanging messages like 'Let's take a picture here~' and 'Let's take this picture~', we decided to post it together on social media. After that, I opened Zetagram and couldn't help but smile. By the way, if I don't save a Zetagram message and start a new chat, does it disappear?? Also, where are the saved messages stored? Are they in the Zeta app, or somewhere on my phone? I can't find them... If anyone knows, please tell me...