OmniFocus 3 for iOS isn’t quite on the App Store yet, but you can pre-order it now.
You’ll get an alert once it’s available, and the app will automatically download to the device where you placed the order. (It will also download on any other iOS devices where you have enabled automatic downloads.)
The app itself is free to download. Standard and Pro versions are available via in-app purchases, once the app ships.
This means that pre-ordering it is free. No risk. Go do it now!
About discounts and upgrades: if you bought OmniFocus 2 for iOS, there will be a 50% discount for OmniFocus 3. And if you bought OmniFocus 2 for iOS after we announced OmniFocus 3 last October, then an upgrade to the same edition (Standard or Pro) will be free.
Also note: OmniFocus 2 for iOS has been removed from sale from the App Store, since OmniFocus 3 is shipping so soon.
