As Day One Classic is no longer available for purchase, it has been removed from the App Store.
If you've previously purchased Day One Classic (version 1.x), you can download it from your purchase history. You must be using the same Apple ID and be located in the same country as when you first downloaded Day One Classic.
iPhone (iOS 10)
- App Store > Updates > Purchased, then search for "Day One". (See video below)
iPad (iOS 10)
- App Store > Purchased (tab at the bottom).
Tap your account photo at the top right > Purchased > Search for "Day One"
- Mac App Store > Purchased (tab at the top) > then scroll to find "Day One Classic".