Must-Ring: Calendar Alarm
Appointment & Task Reminders
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Turn calendar events into alarms that ring through Silent and Focus. Set alarms for any future date. Start free; unlock Pro with one purchase.
Turn appointments and calendar events into alarms that ring through Silent and Focus. Choose an event from Apple Calendar, or set an alarm for any future date and time.
CALENDAR EVENTS THAT RING
• Browse upcoming events from Apple Calendar
• Choose an event and create a separate system alarm
• Add an optional early heads-up before the event
• Calendar details are copied when you create the alarm; later calendar edits do not update it automatically
ALARMS FOR ANY FUTURE DATE
• Set a one-time alarm for an appointment, meeting, task, or deadline
• Choose the date and time you need
• Stop the alarm or snooze for 5 minutes
• Search and review your active and past alarms
FREE TO START
• Keep up to two active alarms
• Create manual or calendar-based one-time alarms
• Add a 5-minute or 10-minute early heads-up
• View local alarm activity insights
MUST-RING PRO — ONE-TIME PURCHASE
• Keep unlimited active alarms
• Repeat daily, on weekdays, or weekly on a selected weekday
• Choose custom early heads-up timing
• Snooze for 10, 15, 30 minutes, or a custom duration
• Explore private calendar insights for your recent schedule
One-time purchase. No subscription.
PRIVATE BY DESIGN
Alarm titles, notes, calendar names, event details, and scheduled times stay on your device. Calendar access is used to create alarms and calculate insights locally. Anonymous product analytics may be used to improve the app, but it does not include your calendar or alarm content. No account is required.
Requires iOS 26 or later. Must-Ring uses Apple’s AlarmKit. Alarm behavior depends on Alarm permission, successful scheduling, and device settings. Must-Ring is not intended for medical, emergency, or safety-critical alerting.
Ratings & Reviews
User experience improvements.
The developer, 紫妍 连, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 紫妍 连
- Size
- 3.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Must-Ring Pro (Founding Offer) $4.99
- Must-Ring Pro $9.99
- Copyright
- 2026 © AstraDev