I use my iPads everyday on Hamsphere.
Go to the App Store on your iPad and top right of menu in the search box, enter HAMSPHERE
Download the app.
If it does not come up, go the other way around with iPad go to Google and enter :
"hamsphere download for ipad"
Top of list will take you to the App Store by the back door!
Once downloaded, open the app and log in.
You will see it is a small but very efficient version that works well.