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 your calendar events into urgent alarms that bypass silent mode and focus settings. It helps you proactively manage your schedule by setting real alarms for important meetings and tasks, ensuring you never miss an important appointment.
✓Alarms bypass Silent mode and Focus
✓Customizable alarm and snooze times
✓Automatic alarm updates for rescheduled events
✓Create custom alarms via text or voice
✓Daily ritual with morning reminders
✓Home Screen and Lock Screen widgets
✓Apple Watch integration
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What's New in Muster
1.0.6
October 29, 2026
Ready for iPhone Duo
4
Subscriptions & In-App Purchases
$9.99
Muster Unlock
One-time purchase to keep using Muster after free trial
User reviews
Developer apps
FAQ
Does Muster have ads?
No, Muster is ad-free. The app is a one-time purchase after a 14-day free trial, ensuring an uninterrupted user experience without advertisements.
How does Muster handle silent mode and focus settings?
Muster's alarms are designed to break through Silent mode and Focus settings on your device. They will ring audibly until you act on them, ensuring you are alerted to important events.
What calendar accounts does Muster support?
Muster works with the calendar accounts already on your iPhone or iPad. This includes popular services like iCloud, Google Calendar, and Microsoft Exchange.
Can I customize alarm timings in Muster?
Yes, you can customize alarm timings. By default, alarms ring 10 minutes before an event and can be snoozed for 9 minutes, but these can be changed in settings or set individually per event.
Is Muster available on Apple Watch?
Yes, Muster is available on Apple Watch. You can view your day, arm alarms, dictate new ones, and add a complication for your next alarm directly from your wrist.
What happens if an event is rescheduled or canceled?
When events are rescheduled or canceled, Muster automatically updates their alarms the next time you open the app. This ensures your alarms remain accurate with your latest schedule.
How much does Muster cost?
Muster is free for 14 days, after which a one-time purchase is required to continue setting alarms. It is not a subscription service.
Is Muster safe to use with my calendar data?
Yes, Muster is private by design. It operates in read-only mode, meaning it never adds, edits, or deletes anything on your calendar. It also does not require an account, tracking, or cloud storage.