CalRinger - Reminders for Google Calendar events

As opposed to default one-time alert notification sent by Google Calendar app, this app gives persistent reminders for calendar events. You are assured a complete peace of mind that no calendar event will skip your attention because of a missed alert notification.
This together with a number of customization options for event reminders, will totally revolutionize "Google Calendar" functionality for you, as a whole.

• Persistent reminders/alarms which keep ringing, until explicitly dismissed.
Instead of easily missable notification alerts.

• Each event created using Google calendar app, would create
a corresponding reminder in this app.

• Rock solid reliable reminders. No more missed calendar notification issues.

• Simple & intuitive UI, with a one glance synopsis of each event’s key fields like
due time, time left, title, notes, location etc.

• Lots of customizable settings :

Reminder ring time : Choose reminders to ring at event time or 15/30/45 mins etc. before event time.

Alarm tone : Choose a persisting alarm tone from ringtones or any music file on your device.

Alarm volume : Configure alarm volume as desired.

Volume fade-in : Reminder volume will build up gradually as per your setting (15/30 sec, 1/2/4 mins etc.)

Vibrate(On/off) : Enable phone vibration when reminder rings.

Auto-dismiss (Unattended reminders) : In case reminder is left unattended, auto- dismiss reminder after an interval.(15/30 sec, 1/2/4 mins etc.)