From IPad a have SLT130 & AVX with WiFi adapter using SkySafari - not my preferred as it needed something else for focussing, scheduling etc. I was using a DSLR with intervalometer.
Which brings me to:
The ASI Air/AirPro which control AVX/CGEM-DX/CGX-L mounts, and their EAF, filter wheel, and their image and guiding cameras.
Option I have also done with a Stick PC (not much bigger than my index and forefingers combined)
TeamViewer on the iPad, managed PGP2, SGPro (managing scheduling, Celestron’s filter wheel, Pegasus focusser), Astronometry and Stellarium
Have done the same using Mico$oft Remote apps.
I can do a complete breakdown if need.