Cross platform terminal emulator?

Is Termius the only cross platform emulator that includes Android as one of the platforms? It is quite good, in my limited experience, but too expensive for a hobbiest. I like that I can use my Linux desktop, MacOS laptop, and Android tablet/phone and the UX is the same across them all. The sync (trial for free, then charge) is great. But I'd be fine if it was something where I could DIY a sync method with something like Syncthing.

I'm aware of the likes of Alacritty, but no mobile app. And of course Termux is great for mobile, but no desktop versions.

It all boils down to wanting some sort of sync function either DIY or otherwise that includes hosts and SSH keys and while not as important, I do like the consistent UX between platforms. Is there something else to consider?