FWIW I think the iPad is the platform of choice for Skydemon. A lot of the functions work better on them than on Android tablets. You do have to be aware though that Apple do force you on to an upgrade path of their choosing and the iPads are significantly more expensive.
If you did as I did and buy an older version iPad, I now find the software can't receive updates for SD.
My view is that if you have a definite need for an iPad outside of aviation usage, then go ahead. If you are buying it specially for aviation, save money and get an Android. They are cheaper, perform well and if you drop them or lose them, the financial loss is easier to bear