yes I'm aware of it, I'm deeply involved in XMPP community (XSF member) and have met Kaidan devs a couple of times (it's a promising client BTW).
My client (Salut à Toi) predates Kaidan by years and is not focusing only on instant messaging, also it's not the same technology stack and the mobile frontend uses Kivy, which is well adapted for touch screen.
[1]: https://www.kaidan.im/