# Muster – Calendar Alarms — A call to alarms

> Calendar event alarms that ring through Silent and Focus modes. (iPhone/iPad app by Driven Leaf, LLC.)

- Source: https://appshunter.io/ios/app/muster-calendar-alarms/id6809646719 (this page in markdown: same URL + `.md`)
- Developer: [Driven Leaf, LLC](https://appshunter.io/developer/1258426123)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 26.1 · 9 MB
- Languages: American English
- Released: 2026-09-17
- Data updated: 2026-09-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/muster-calendar-alarms/id6809646719/reviews.md

## What is Muster?

Muster turns the meetings you can’t be late for into real alarms—the kind that ring through Silent mode and Focus until you act on them, not a notification that’s easy to miss.

Each morning, open Muster to see your day. A dot on the bell marks events that look like they need an alarm: video calls, places to be, meetings with other people. Tap a bell to arm one, or arm every suggestion at once.

Real alarms for your calendar
- Alarms break through Silent mode and Focus, show on the Lock Screen, and can be snoozed
- By default each rings 10 minutes before the event and snoozes for 9. Change both in Settings, or set your own on a single event
- Give a repeating meeting its own timing and Muster remembers it next time
- When events are rescheduled or canceled, their alarms change the next time you open Muster.

For anything not on your calendar, simply tap + and type or dictate them. “Standup 9, Design review 11, Quarterly planning 4:30” sets three at once.

A daily ritual
- An optional morning reminder at the time you choose, on weekdays only if you like
- Switch off calendars that don’t need alarms, like holidays and birthdays

On your Home Screen and your wrist
- The Today widget lists your events with a bell beside each. Tap one to set its alarm without opening Muster
- Lock Screen widgets show whether today’s alarms are set and what’s next
- Shortcuts actions help you integrate Muster into your existing automations
- On Apple Watch, see your day, arm alarms from your wrist, dictate new ones, and add a complication for your next alarm

Private by design
- Read-only: Muster never adds, edits, or deletes anything on your calendar
- No account, no tracking, no cloud
- Works with the calendar accounts on your iPhone or iPad, including iCloud, Google, and Microsoft Exchange

Free for 14 days, then a one-time purchase to keep setting new alarms. Not a subscription. Family Sharing supported.

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Muster Unlock | $9.99 | one-time |
| Muster Tip - Riser | $0.99 | one-time |
| Muster Tip - Ringer | $2.99 | one-time |
| Muster Tip - Reveille | $4.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/muster-calendar-alarms/id6809646719/reviews.md

### 5/5 — I use it every day!

*2026-09-18*

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.

## Frequently asked questions about Muster

### 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.

## Version history (last 2 releases)

### 1.0.1 — 2026-09-18

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

### 1.0 — 2026-09-17

No release notes.

## More apps by Driven Leaf, LLC

- [Accio Patent](https://appshunter.io/ios/app/accio-patent/id1258426127)
- [Clovers - Strategy Board Game](https://appshunter.io/ios/app/clovers-strategy-board-game/id6763470718)

All apps by Driven Leaf, LLC: https://appshunter.io/developer/1258426123

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-24.*