Calarm vs Event Alarm Sync
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calarm
This app automatically wakes you before your first calendar event and alerts you to upcoming events throughout the day. It offers customizable alarms for all calendar entries, including all-day events and birthdays, with options to snooze, mute, or cancel specific alerts.
- Automatic alarms for calendar events
- Bedtime reminders
- Customizable alarm cancellation and muting
- Quick alarms for naps
- Event display on lock screen
- Adjustable snooze interval
- Sync settings across devices
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Never oversleep a meeting, class, or any other event again! Simply open the app, and you're ready to go! This app will automatically wake you up every day before your first calendar event and alert you about events during the day. • Alarms for all calendar events, including all-day and birthdays • Bedtime reminders • Ability to cancel specific alarms • Ability to mute specific alarms • Ability to change alert time for specific alarms • Quick alarms - great for naps • Send Quick alarms as a reminder to a friend • No need to customize events • No need to open the calendar app • Select which calendars make alarms • Adjustable wake up time • Separate time interval for daytime events • Reads calendar app, so no internet connection is needed • Snooze any event • 5-15 minute adjustable snooze interval • Shows event on the lock screen with time until event and location • Control alarms for busy or free events • 31 different alarm sounds • Set up behaviors to better customize to your needs • 12/24 hour clock • Control event behavior from notes • See alarm location, time, end time, and calendar • Alarms can be defaulted to on, off, or muted • Set default time to wake up each day • Sync settings across all your devices App must be opened to find new calendar events
Event Alarm Sync
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Turn upcoming Calendar events and dated Reminders into alarms you can manage from your iPhone. Event Alarm Sync reads the calendars you select, builds a clear timeline of upcoming events and alarm times, and delivers alarms through AlarmKit by default, or through standard notifications when you choose Respect Silent Mode. The app processes Calendar and Reminder content locally. PLAN ALARMS AROUND YOUR SCHEDULE • Use reminder times already attached to Calendar events • Apply a default minutes-before offset • Create custom reminder offsets for individual events • Include incomplete Reminders that have due dates • Choose App Reminder Only timing without changing Calendar alerts STAY IN CONTROL • Choose which calendars can create alarms • Filter all-day, tentative, and declined events • Silence or restore individual alarms • Confirm deletion of eligible writable Calendar events or Reminders • Separately replace eligible Calendar alerts after verified app delivery, with a conditional restore option • Turn all event alarms off with one master control • Choose a fixed snooze time or open a meeting link when available CHOOSE HOW ALARMS ARRIVE • Always Sound uses the iOS alarm screen and system Stop control • Respect Silent Mode uses standard notifications that Silent Mode, Focus, Scheduled Summary, or notification settings may mute or delay • Tap a notification to open Stop, Snooze, or Join in the app; standard notifications do not show a full-screen alarm • Respect Silent Mode requires Notifications, Alerts, and Sounds access and room for no more than 48 pending notifications for this app. If a later schedule exceeds the budget, the app can return to Always Sound and show the change in Settings. PERSONALIZE EACH ALERT • Select from the system alarm sound or five included sounds • Choose how much event information appears in the alarm title • Preview included sounds before scheduling CHECK WHAT IS NEXT • Review upcoming Events and Alarms in the app • Add Home Screen widgets in small, medium, or large sizes. The Event Alarms master control supports both delivery modes; individual alarm controls in Respect Silent Mode open the app. • Add an accessory widget to the Lock Screen • Keep alarm state synchronized between the app and its widgets PRIVACY BY DESIGN Core calendar, reminder, alarm, settings, widget, and diagnostic data is processed locally. When Share Anonymous Analytics is enabled, Event Alarm Sync sends a small allowlisted set of anonymous usage and sanitized reliability data. Turn it off at any time in Settings. Calendar or reminder content, meeting links, alarm times, and local diagnostic logs are never sent. The app has no account system, advertising, or cross-app tracking. Requires iOS 26 or later. Sound, vibration, notification presentation, and background calendar refresh timing depend on iOS settings and system behavior. Manual delivery-mode changes are blocked when an alarm or Snooze is due within 15 minutes. Settings reports when delivery cannot be verified.
Screenshots
Verdict
The clearest difference is price: Event Alarm Sync at Free against Calarm's $1.99. Event Alarm Sync also leads on update cadence (every 8 days vs every 6 weeks). Calarm's advantage is iOS requirement (18.0 vs 26.0). On ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Event Alarm Sync is free to download; Calarm costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Calarm ships an update every 6 weeks, Event Alarm Sync every 8 days. Both last shipped on October 24, 2026.
| Parameter | Calarm | Event Alarm Sync |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 2.8 (13 ratings) — better | — |
| Positive reviews | 45.9% of reviews | — |
| Number of ratings | 13 — better | — |
| Update frequency | Every 6 weeks | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 18.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 19 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | squishLogic | ARGO 34, INC. |
In-app purchases
Calarm
No in-app purchases
Event Alarm Sync
No in-app purchases









