Hi Adam,
It depends on what operating system you have on your Mac and iPad Air 2.
If you have iOS 10.3 at least on your iOS devices, then you’re good with Tap Forms 5.
If you have macOS Sierra or newer on your Mac then you’re good.
If you can’t run Sierra on your Mac or you can’t run iOS 10.3 on your iPad, then you’ll need to use the older version.
Tap Forms 3.5.20 for Mac is the latest available on my home page.
Tap Forms 4.0.7 for iPhone is the latest version for iOS.
But the older version for iOS requires you purchase the iPhone version separately from the iPad version. In Tap Forms 5 I’ve combined them into one universal app.
Yes, they’re still available.
Here’s Tap Forms HD 4.0.7 for iPad:
https://itunes.apple.com/us/app/tap-forms-hd-organizer-and-secure-database/id410500116?mt=8
Tap Forms 4.0.7 for iPhone:
https://itunes.apple.com/us/app/tap-forms-organizer-and-secure-database/id291405311?mt=8
And you can download a 10 day trial for Mac from here of Tap Forms 3.5.20:
https://vendors.paddle.com/download/product/498110
Or if you prefer to buy it from the Mac App Store, then here:
https://itunes.apple.com/us/app/tap-forms-organizer-and-secure-database/id494995266?mt=12
You can use iCloud to sync the older versions.
But please note that all new development and bug fixes are going into the Tap Forms 5.x versions.
Thanks!
Brendan