I’ve been using this for the last 40+ years:

This is likely way overkill for your needs, but I have Home Assistant control my phone’s alarms, based on my various calendars that I sync using CalDav through DAVx5. HA will adjust the wake-up buffer based on what calendar the event is - so if yesterday I had an in-person appointment at 10am, and the buffer was 2.5h, but tomorrow’s event is remote, I don’t need to wake up as early, and so it adjusts the buffer because of it. This is set in the automation.

alias: wreckedcarzz - Auto-Set Phone Alarm from CalDAV
description: ''
triggers:
  - trigger: calendar
    event: start
    offset: '-8:0:0'
    entity_id: calendar.appointments
    id: in_person
  - trigger: calendar
    event: start
    offset: '-8:0:0'
    entity_id: calendar.appointments_remote
    id: remote
  - trigger: calendar
    event: start
    offset: '-8:0:0'
    entity_id: calendar.trips_and_vacations
    id: trips
    enabled: false
  - trigger: calendar
    event: start
    offset: '-8:0:0'
    entity_id: calendar.work_schedule
    id: work
conditions:
  - condition: template
    value_template: '{{ trigger.calendar_event.all_day == false }}'
    alias: Make sure the event is not for the whole day
  - alias: Last triggered at least 12 hours ago
    condition: template
    value_template: >-
      {{ this.attributes.last_triggered == None or (now() -
      this.attributes.last_triggered) > timedelta(hours=12) }}
actions:
  - variables:
      new_buffer: >-
        {% set current = states('input_number.alarm_wake_up_time_buffer') |
        float(0) %}

        {% if trigger.id == 'in_person' %}
          {{ current if 2.5 <= current <= 3.5 else 3 }}
        {% elif trigger.id == 'remote' %}
          {{ current if 0.5 <= current <= 2.0 else 1 }}
        {% elif trigger.id == 'work' %}
          {{ current if 1.5 <= current <= 2.5 else 2 }}
        {% elif trigger.id == 'trips' %}
          {{ current if 1.0 <= current <= 2.0 else 1.5 }}
        {% else %}
          {{ current if 1.5 <= current <= 3.5 else 2.5 }}
        {% endif %}
      alarm_hour: >-
        {{ ((as_datetime(trigger.calendar_event.start) | as_local) -
        timedelta(hours=new_buffer | float)).hour }}
      alarm_min: >-
        {{ ((as_datetime(trigger.calendar_event.start) | as_local) -
        timedelta(hours=new_buffer | float)).minute }}
      event_title: >-
        {{ trigger.calendar_event.summary | replace(',', '') | replace(':', '')
        }}
  - alias: Update the dashboard slider
    action: input_number.set_value
    target:
      entity_id: input_number.alarm_wake_up_time_buffer
    data:
      value: '{{ new_buffer | float }}'
  - alias: Send the alarm command
    action: notify.mobile_app_wreckedcarzz_phone
    data:
      message: command_activity
      data:
        ttl: 0
        priority: high
        intent_action: android.intent.action.SET_ALARM
        intent_extras: >-
          android.intent.extra.alarm.HOUR:{{ alarm_hour
          }},android.intent.extra.alarm.MINUTES:{{ alarm_min
          }},android.intent.extra.alarm.MESSAGE:{{ event_title
          }},android.intent.extra.alarm.SKIP_UI:true

Then I created the necessary helper (input_number.alarm_wake_up_time_buffer) for how early to set the alarm at runtime. Integrate CalDav of course, syncing your calendars to HA, and adjust the automation script as needed. Make sure HA can run in the background/is not limited by battery optimization. And this all requires the HA companion app, obviously.

Boom, with all that in-place, I just set my events into my calendar, they sync, HA triggers a couple hours before I need to wake up, it sets the alarm, and I get woken up at the planned time.

I use the Google clock, so no promises for any other system, but I’ve been using this for 6+ months and it’s been great. It does add a point of failure (server/HA freezes; internet outage when the automation triggers) but it hasn’t happened yet, just hypotheticals.

I use an old Palm m515 with WeekUp

https://palmdb.net/app/weekup-alarmclock

I set different alarm times per day of the week, and they cycle identically. I can also set a different alarm for days this week and it doesn’t affect following weeks (unless I want it to)

I appreciate that this isn’t “new” by any stretch of the word, but it’s straightforward and works well for me. If you wanted to try something similar you could probably find an old Palm m500/505/515 or Handspring Visor on eBay quite cheaply. Battery powered devices will always work, but if you’re handy with electronics replacing a worn out rechargeable battery also isn’t that difficult.

If you make sure whatever you have has a USB cradle or cable you can use something like PilotBridge to install applications on it without relying on the old sync software: https://pilotbridge.tavisco.dev/

Oh my God. I’m sure that for most people this is mildly infuriating, but I think I’d be devastated.

I use the default Google clock, so let’s hope they don’t follow suit.

I once had your same issue. I mentioned it to a coworker. The next day, he came to work and gave me an alarm clock. No radio, just time, alarm time and HORRIBLE BUZZNNRRTNRRRTNETTTRRRT

Set it up across the room, never switched back to an app again. Give it a try! Hit a local thrift shop or something and tell me in 3 months that it didn’t change your life

Been happy with sleep as android has kept me from snoozing too much or turning off the alarm in my sleep. Has a ton of options math, QR code scanning, nfc ect.

Simple Alarm Clock (FOSS) has been working fine for me