I also have been using Terminus from iOS to get to servers I manage. It's been great, thanks. They keyboard will always be difficult but you solved cursor keys and tab. How are you going monetize?
From the research I've done when I was considering using my iPad as a terminal, Termius seemed like hands down the best iOS terminal app. However on macOS, you're going to have to compete with the likes of iTerm2, Kitty, and Alacritty, all very fine open source programs innovating in the terminal space.