The most reliable options today are Alarmate and OnTimer for meeting‑style alarms, plus the built‑in iOS Clock app or a “critical alert” alarm app like AlarmUp; all are designed (or able) to ring even when your iPhone is on silent.

Here’s how they compare and what I’d actually recommend:

1. Use a calendar-based alarm app for meetings

For meetings, you want alarms tied to calendar events that cut through silent / Do Not Disturb and behave more like a ringing alarm than a one‑off notification.

Alarmate

• Purpose-built to turn calendar events into real alarms, not just notifications.
• Explicitly states that its alarms ring through Silent mode, Focus, Do Not Disturb, Sleep mode, and Airpl…

The strongest Fantastical alternatives on iPhone that still give you reliable alerts before events are Apple Calendar, BusyCal, Calendars by Readdle (Calendars 5), Timepage, and Google Calendar.

Below are good options depending on what you want, all of which support advance notifications:

1. Apple Calendar (built‑in, free)

• Why use it: Deeply integrated with iOS, very reliable notifications, includes excellent travel time alerts telling you when to leave based on traffic.
• Alerts:
• Multiple alerts per event (e.g., 1 hour before, 10 minutes before).
• “Time to leave” alerts that factor in location and traffic when you set a location on an event.
• Pros:
• Already installed, work…

You have two overlapping “Do Not Disturb” systems that can block Zoom calls:

• iOS Focus / Do Not Disturb (system‑wide)
• Zoom’s own Do Not Disturb / presence status and notifications

To stop missing Zoom calls, you need to adjust both so Zoom is allowed to notify you even when your phone is quiet.

1. Make sure iPhone Do Not Disturb isn’t blocking Zoom calls

On current iOS, Do Not Disturb is part of Focus. You can let specific apps (like Zoom) break through DND.

A. Check your Do Not Disturb / Focus settings

1. Open Settings → Focus → Do Not Disturb.
2. Under People:

• If you want no phone calls while in DND, choose Allow Notifications From → (empty list) and set Allow Calls From → Al…

The closest match to what you want is an app that creates real system alarms from your calendar events, because those can bypass Silent, Do Not Disturb, and Focus modes on iPhone.

Based on current options, these are the apps you should look at:

• Unmissable: Calendar Alarm
• Explicitly advertises: “turns your calendar events into real system alarms — the kind that break through Silent Mode, Do Not Disturb, and Focus.”
• Works with your existing calendar; you set alarm rules for events (e.g., all meetings, or events with certain keywords).
• Uses full alarm-style alerts that behave like the Clock app, not regular notifications, so they still ring in Focus.
• iPhone-only; free with i…

The simplest option is Google Meet itself: on mobile, scheduled meetings appear in the Meet app, and you can tap the meeting and then Join right when it starts. If you want a true one-tap join link, the best experience is usually the meeting invite link itself, because tapping it on a phone opens the Meet app and joins the call directly.

If you want the closest match to “one tap join when the meeting starts,” here are the best options:

• Google Meet app — shows upcoming scheduled meetings in the app, so you can tap Join as soon as the meeting begins.
• Calendar event with Meet link — the meeting appears in Google Calendar/Meet, and tapping the event lets you join immediately.
• Email, text…