Calendar Application focused on keeping notifications safe
Being born as a blend of "Calendar Notifications Plus" and calendar by The Etar Project (based on AOSP), this app implements an alternative calendar application for android OS.
Special focus of this app is to make sure no event notification is lost by either technical failure or by user accidental action (like unintended swipe on the screen).
IMPORTANT: do not disable your stock calendar app, this can cause calendar synchronization issues. Instead disable "notify on this device" in the stock calendar settings to avoid double notifications.
All event notifications are made ongoing, so open the app and swipe the event away to dismiss it. (Or use the notification action by expanding it in the notification area).
Application is fully open source and completely ad free.