Date Alarm & Shift Calendar

Worried you’ll forget tomorrow’s shift alarm?
Need reliable alerts without loud sounds?

CAlarm is an alarm app for people who don't want to miss a specific day — a shift, a hospital appointment, an anniversary. You set the date and time, and it rings. The built-in iOS alarm only takes a time of day, so it cannot ring on “April 15 at 2:30 PM” alone. CAlarm can, and it shows full-screen even on the lock screen.

Manage everything in one app.
Add alarms to plans in the app’s calendar, and save templates for one-tap shift & alarm setup.

You can also view upcoming schedules with widgets.

Perfect for
• Anyone who forgets to set an alarm the night before
• Shift workers who don’t want to miss a work day
• Biweekly trash day
• Birthdays and anniversaries
• Hospital and salon appointments
• Concert and event dates
• Anyone who misses banner notifications
• Anyone who wants an alarm on a specific date

Features
• Date-based alarms for specific days
• Full-screen alarms that ring in silent mode
• Biweekly, monthly, yearly, and “3rd Thursday” repeats (Premium)
• Calendar schedule management with alarms
• One-tap templates for shifts & alarms
• Lock screen widget for your next event (Premium)
• Last-weekday and custom repeats, like “Mondays and Wednesdays every 3 weeks” (Premium)
• Share plans and one-time alarms with a link
• Alarm volume control
• Repeat alarms by weekday
• Snooze support
• Heads-up notifications before an alarm
• Multiple alarm sounds
• Customizable theme colors
• A matching app icon for your theme color
• Font settings
• Dark mode support
• Long-press to duplicate alarms

CAlarm registers alarms with Apple’s AlarmKit (iOS 26), so they ring at alarm volume even in silent mode, Focus, and Do Not Disturb, and appear full-screen on the lock screen.
Works on both iPhone and iPad. Requires iOS 26.0 or later. Core features are free.