# Every app that turns calendar events into real alarms on iOS 26, compared > An honest field guide to the AlarmKit calendar-alarm category: MeetAlarm, Alarmate, Beacon, Calerto and the rest — what each one actually does, what it costs, and which to pick. Written by the developer of one of them, disclosure up front. Published 2026-07-27 · MeetAlarm Blog · https://www.meetalarm.app/en/blog/calendar-alarm-apps-compared Search for “app that turns calendar events into alarms” and you'll find a strange gap: a pile of App Store listings elbowing each other, and not a single article that actually compares them. This post is an attempt to fill that gap honestly. Full disclosure before anything else: I build MeetAlarm, one of the apps below. I'll tell you what the others do better, because pretending they don't exist is exactly why this category has no useful roundup yet. ## First, the mechanism test Everything in this category depends on one iOS 26 framework: AlarmKit. It's the first API that lets third-party apps schedule true system alarms — the kind that ring full-screen through Silent and Focus, exactly like the built-in Clock app. Before iOS 26, every “alarm” app for calendar events was really a notification app with loud settings, and a notification will never make a sound while the mute switch is on. That gives you a five-second way to sort the category: check the app's minimum iOS version. AlarmKit requires iOS 26. An app that runs on iOS 18 cannot be using system alarms — whatever its marketing says, its reminders are notifications, with a notification's weaknesses. ## The AlarmKit calendar-alarm apps ### MeetAlarm (the one I make) - Approach: automatic. It reads your calendar (on-device, read-only) and keeps alarms in sync by itself — reschedule the meeting and the alarm follows, cancel it and the alarm disappears. - After the ring: one tap joins the meeting — Zoom, Google Meet, Teams, Webex, Tencent Meeting, Feishu/Lark, DingTalk, FaceTime, and phone dial-ins with the conference code entered for you. - Beyond meetings: any timed event can ring (flights, appointments, interviews), with leave-on-time alarms that use live travel estimates for in-person events (Pro). - Privacy: no server, no account, App Store privacy label “Data Not Collected”. - Pricing: free plan has unlimited alarms on one calendar; Pro (subscription or lifetime) adds unlimited calendars, per-calendar/per-series rules, travel alarms, two-stage alarms, custom sounds. - Honest limits: iPhone-only — no Apple Watch app, no iPad, English and Simplified Chinese only. ### Alarmate: Date Alarm Clock - Approach: manual. Its home turf is alarms for arbitrary future dates (something the built-in Clock still can't do), plus countdown timers; calendar events and Apple Reminders are imported one at a time with a Schedule button. - What it does better than us: an Apple Watch app, lock-screen countdown widgets for any alarm, and Siri natural-language dates (“in 2 days”). It also speaks 17 languages. - Trade-off: scheduled events are copies — if a meeting moves, the alarm doesn't move with it. The free tier caps you at 3 active alarms. ### Reminders & Alarms: Beacon - Approach: automatic, with the category's most expressive rule engine — ring only for events with 3+ attendees, only when a keyword like “interview” appears, only for certain people's invites, and with multiple lead times per event (an hour before and ten minutes before). - What it does better than us: those per-attendee and keyword filters are genuinely clever for people whose work calendar is a firehose of optional invites. - Trade-off: nothing meeting-specific happens after the ring — no join link handling. English and Japanese only. ### Calerto: Meeting Alarm - Approach: closest to MeetAlarm in framing — meeting alarms from your calendar, with the same notifications-vs-alarms pitch. - Its Pro hook is auto-arming the next 7 days of meetings; the free tier is manual. - What it does better than us: price. It's the cheapest paid tier in the category (listed at $12.99/year or a $24.99 lifetime). - Trade-off: no meeting-link parsing or one-tap join, no widgets, no travel-time alarms. ### The smaller ones The long tail makes the same core promise — calendar event in, system alarm out — with thinner feature sets: Calendar Alarm, CalAlarms, Meeting Alarm: Calendar Alerts, CalSyncAlert, AlarmCal and others. If you just need one calendar to ring and nothing else, several of them will do it; check each listing's free-tier shape before paying, because the cut points vary a lot. ## Often recommended, but not system alarms Three apps show up in every “never miss a meeting” thread and deserve a fair description, because they solve the problem with a different mechanism: - OnTimer — persistent, repeating notifications driven by your calendar. Its minimum iOS version is 18, which predates AlarmKit: its alerts are notifications, so Silent mode still silences them. Its leave-on-time feature with live traffic is well made. - In Your Face — a Mac app that takes over your whole screen when a meeting starts. On a desktop that's extremely effective; it just doesn't help the iPhone in your pocket on Silent. - Due — famous for auto-snoozing reminders that nag until you act. Same notification ceiling on iPhone. None of these are bad apps. The distinction that matters is mechanical, not qualitative: only AlarmKit alarms are exempt from the mute switch and Focus modes at the system level. ## So which one? - Your day is back-to-back video meetings and you want the alarm to open the call: MeetAlarm. - You want one-off alarms for arbitrary future dates, on your wrist too: Alarmate. - Your calendar is a flood of invites and you want rules deciding what's ring-worthy: Beacon (MeetAlarm's per-calendar and per-series rules cover much of this too). - You want the cheapest real-alarm option and will arm meetings yourself: Calerto. - You live at a Mac all day: In Your Face — and pair it with any AlarmKit app for the phone. Facts above come from each app's public App Store listing and website as of July 27, 2026; pricing and features change, so check the listing before you rely on any of it. If I've gotten something wrong about your app, email me — hi@meetalarm.app — and I'll correct it.