What ROConnell said. (although the UR22 mkII is great and can be used with an iPad).
I use Cubase Pro, but I do have Elements on my Laptop and it is works a treat.
Elements saves me taking the Syncrosoft dongle out on the road - Elements (and A1) are both soft elicenser, so no USB dongle needed.
Comparison list. (inc Elements).
https://www.steinberg.net/en/products/cubase/line_up.html
A1 it seems, has chord pads and chord track.
What you get list. Which is very good for a freebie.
https://www.steinberg.net/en/products/steinberg_yamaha/cubase_ai.html
The UR22 MkII does have midi in/out, which covers you if your midi keyboard/controller is not USB, or you are struggling with spare USB ports.
It Integrates with all the Steinberg DAW's, so no set up needed.
https://www.steinberg.net/en/products/audio_interfaces/ur_series/models/ur22mkii.html