Remote alarm for Android and iphone

So I work for a tug outfit where our dispatch hours are changing all the time. St the moment, it gets emailed called and texted at all hours of the night for updates. Wouldn’t it be nice if the dispatcher could set the alarm on our phones without calling everything there’s a change!? I was able to find a (crappy looking) app for Android (Flying Alarm) , but nothing for iPhone. Anybody else have these problems, or better yet a solution?

Google allows you to make multiple calendars that you can give other people access to. If you make one and give whoever you want the link then they can edit and add entries and set reminders with alarms. I have done this before and it works pretty well with Android and IOS.