It has very important and useful features such as Search or Event Copy that are missing on most Calendar Apps available on the Store. However, it lacks a critical feature which is the ability to set or subscribe to the calendar of your choice. Ideally, it should load automatically all calendars that you already have on your Apple Calendar App (lot of IOS Apps do it).
As iPhone users, we need at least a way to view or to synch with iCloud Calendar in order to use this app. Adding this feature would make it one of the best Calendar Apps on the App Store (5*). Otherwise, if you are not a user of Google Calendar, forget it. This app would be useless for you.
Karimgrad about Jorte Calendar, v1.0.3