The comments here are full of people complaining about iOS alarm bugs, so for anyone else who is sick of this: Sharp makes a lovely selection of alarm clocks. For between five to twelve US dollars, you too can be freed for life from said bugs. As a bonus, the first thing you touch in the morning, and the last thing at night, will no longer be a device that is socially engineered to destroy your mind for profit.

I have the Sharp Twin Bell, one of the higher end models at $12.63 from Walmart.

I have the same one, and my favorite unexpected feature coming from other more digital alarm clocks is that you have to set it every night. There is nothing but an on/off switch; if the alarm is ringing, you switch the alarm off, then turn it back on in at least 12 hours (or else it'll go off at, say, 8PM). That means part of my nightly routine is checking my calendar and turning on my alarm as appropriate, but now I never worry about the alarm being set for too early/late/on on a holiday. Also, it's so loud, I haven't fallen back asleep after the alarm since I got it.