I use it every day!
Before Muster, I used Siri every morning to set half a dozen alarms for meetings I couldn’t miss. Then every night I’d have to go to the alarms app and delete them all one by one. Muster is so fast and simple.
Free
In-App Purchases
About
This app transforms calendar events into audible alarms that bypass Silent and Focus modes. It helps you set real alarms for important meetings and appointments, with customizable timing and snooze options. You can also create custom alarms for unscheduled tasks directly within the app.
✓Alarms bypass Silent and Focus modes
✓Customizable alarm timing and snooze
✓Set alarms for repeating meetings
✓Create custom alarms for unscheduled tasks
✓Today widget and Lock Screen widgets
✓Apple Watch integration
✓Read-only calendar access
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What's New in Muster
1.0.1
September 18, 2026
New - Added the extra-large iPhone widget (iOS 27 only) Improved - Apple Watch: adding manual alarms is faster - iPhone: tapping the + button brings up the keyboard immediately, with improvements to the number bar Fixed - The event detail view now refreshes if you leave Muster to edit the calendar event and come back - Arming and then deleting an event no longer rings if it was the only event on your calendar for the whole day
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Subscriptions & In-App Purchases
$9.99
Muster Unlock
One-time purchase to keep using Muster after free trial
User reviews
Developer apps
FAQ
How does Muster handle Silent mode and Focus?
Muster alarms are designed to ring through Silent mode and Focus, ensuring you don't miss important events. They will appear on the Lock Screen and can be snoozed.
Can I customize alarm times in Muster?
Yes, by default alarms ring 10 minutes before an event and can be snoozed for 9 minutes. You can change these defaults in Settings or set custom times for individual events.
Does Muster work with repeating meetings?
Yes, Muster allows you to give repeating meetings their own specific timing, and it will remember these settings for future occurrences.
How does Muster handle rescheduled or canceled events?
When events on your calendar are rescheduled or canceled, Muster automatically updates their associated alarms the next time you open the app.
Can I create alarms for things not on my calendar?
Absolutely. You can tap the '+' button to type or dictate custom alarms for any task or event not already in your calendar.
What calendar accounts does Muster support?
Muster works with the calendar accounts already on your iPhone or iPad, including iCloud, Google, and Microsoft Exchange. It accesses them in read-only mode.
Is Muster free to use?
Muster offers a 14-day free trial to set new alarms. After the trial, a one-time purchase is required to continue setting new alarms. It is not a subscription.
Does Muster have ads?
No, Muster does not contain advertisements. It is designed to be ad-free.