Yes, Flexi Data
and Data Angel Overseas
both work with iPad. If your data is used up, when you start browsing the web, you will be redirected to a web page where you can buy more data.
Please note, that as iPad cannot send and receive TXTs so you will not get notifications at 80% and 100% of your data allowance.
You can check your data allowance anytime using My One NZ
on the web or through our iOS app. To register for My One NZ, you will need your iPad's mobile number (the phone number associated with your SIM card).