Yes, because the application allows you to use your Google account which can be accessed on your both devices. First, log in to your Google account and open aCalendar. After you tap the + icon do add a new entry, press the drop-down list below the X icon and select your Google address. Fill up all the fields, and the entry will be saved to your account. If you have issues, you can use
email@example.com email address to get in touch with the developer.