If you need help selecting hardware, here is our recommendation.
iPad Air 2 + Wifi is recommended. You may prefer a smaller iPad Mini or a larger iPad Pro. Check them out at the Apple Store to see what suits you best.
iPhone 6 or iPhone 6+ is recommended. Any size— Fast Notes is less than 16MB.
Any desktop computer (PC or Mac) with internet access.
Make sure your iPhone and/or iPad is running iOS 8.0 or higher.
Tap ‘Settings’ on your device.
Tap General in Settings.
Tap ‘About’ to see what iOS Version you currently have installed.
To updated software to the latest version, Tap ‘Software Update’ and follow the on-screen prompts.