Currently, you can only download the wifiCFI Mobile App directly to your iPhone. You cannot download directly to an iPad. However, there is a work-around established by Apple where you can transfer (or copy) the iPhone App to your iPad. You can do so by following the steps listed below.
HOW TO TRANSFER WITH ICLOUD
Tap the "Settings" icon on your iPhone home screen.
Select the "Store" option.
Slide "Apps" to "On" in the "Automatic Downloads" section.
HOW TO TRANSFER WITH APP STORE
Tap the "App Store" icon on your iPad home screen.
Tap your profile icon in the top right corner.
Select the "Purchased" tab and then tap "Not on this iPad."
Tap the "Cloud" button to install apps that are not already on your iPad. This includes apps that you have downloaded on your iPhone. It will be the Wix Spaces app you will want.