I've enjoyed using Zenkit. You can view tasks in multiple ways (kanban as one of them) and has more features beyond simple task tracking, if you dig into it. Android/iOS apps and the web UI is quite good.

I have an S1 Pro and I hate it. Creality support is terrible and I've constantly had issues.

Replaced multiple parts and cables. When I can tolerate it, I'm going to try a TH3D mainboard in it and see if that gets it anywhere near reliable.

My next printer will probably be an Elegoo on the cheap end or a Prusa if I can afford it.

Keep in mind that you are buying into a hobby, not buying a tool.