iOS 17 iPhone Alarm Turns Off with StandBy Mode

Exact same thing. Got a MagSafe stand (my first), set-up Standby and off to sleep I went… only to wake up nearly 45 minutes after my alarm was set to go off and find out that it actually had been going off… but silently. WTF, Apple?

Livwild3 wrote:

I set around 15 alarms to go off in the morning to wake me up. (I’m awful at making myself get up). So I give myself time to snooze. Ever since I’ve updated the newest one, anytime I snooze, the other Alarms aren’t going off or something?

It has been true for years that, if you snooze an alarm and the snooze overlaps with a subsequent alarm, the subsequent alarm will not fire. So, either set your alarms to be more than nine minutes apart (and only snooze once) or diable this snooze function and just rely on the multiple alarms.

I have had this happen once. Iphone Xs (my 15 isn’t here yet) in landscape for the first time overnight. It was the first time I used standby mode overnight. Missed getting up by 30 mins, woke to find a prompt on the phone that indicates the alarm is going off. But its actually completely silent.

Completely beyond me how this gets through a beta to public release.

Disabled Standby and put the phone back in portrait overnight. Worked. Getting some trust back. I won’t be using standby until I have seen positive news on this one, shocking stuff, alarms are basic.

Yes… this is the issue I thought I was having! I just tested it out tonight. I set two alarms one minute apart and put my phone on the charger in landscape orientation so it would go into StandBy. The first alarm went off just fine… I could stop or snooze; however, after stopping the first alarm, my HomePod controls pop up and, when it’s time for the second alarm to go off, the alarm sounds for 1/4 of a second and then stops completely (not even enough time to notice it was going off if I had been fast asleep)! I wake up at 2:45am for work and this has been happening for a while and I thought I was just sleeping through my alarms or snoozing them from my watch, but glad to know that it’s just a glitch. Won’t be using StandBy for a while!! Hopefully there’s a fix coming soon, I really like the feature.

Hi, so installed 17.1 and tested. Alarms are triggered ok, but silent alarms wont vibrate they just notice you on the screen, tested with sounds and worked. I think that vibrate while in magnetic charger is disabled to avoid the phone to unlock?

I have noticed that when in standby mode and my phone is in DND sleep, I can tap snooze ONE time. However, when those 9 minutes are up my alarm turns off completely. I noticed this because I listen to music through headphones while I sleep (gotta drown out the partner's snoring lol) and the music will temporarily pause like the alarm is going to go off but then the music will resume 1 second later. I look at my phone and it is still in standby mode with DND sleep on and the alarm is turned off completely.

I did not touch the phone after the first snooze, I did not look at the phone after the first snooze, I did not even bump the table it was on.

This is only happening in standby mode, which is super frustrating because I wake up through the night and like to quickly look at the time without getting blinded by the light on my phone. So standby mode has been perfect for me. This issue does not happen when I have the phone in portrait mode with the DND sleep on. Please fix this issue apple.

Currently on iOS 17.0.3 with an iPhone 15

Well i am happy to report that (at least in my case) 17.1 update seems to resolve the issue with alarms not going off in standby mode. It now works perfectly for me. One note - i do not use snooze function, so i can not comment on that. I prefer to have multiple alarms set without snoozing 😴 🙂

iOS 17.1 only partially fixed the problem for me. I am using an iPhone 15 pro. 

iOS 17.1 (kind of) fixed the problem of a too low volume of the alarm sound in standby mode despite setting preferred volume. The volume starts out fine but then lowers after the first cycle or two of the sound loop. The lowered volume now is still louder than it was before the fix but could still be insufficient for heavy sleepers. I waited 30 seconds to see if the volume ramped up louder but it did not. 

My preferred alarm is just vibration however and iOS 17.1 did nothing to fix the lack of vibration. My iPhone still doesn’t alarm with vibration in standby mode with or without an audible alarm sound selected. I’m a light sleeper. The vibration on my nightstand is enough to wake me up without disturbing my wife. I have been using vibration only alarms on iPhone for years. It still works in portrait mode in iOS 17.1. 

I have not done snooze troubleshooting that others have described in this thread. 

I’m guessing, from Apple’s perspective, the problem has been difficult to fix. But from a customer perspective, it’s pretty simple. If Apple makes a software feature to allow iPhone to behave like a smart, customizable alarm clock, it should at the very least actually be able to alarm to wake its user. I’d prefer a reliable alarm to different time numeral fonts. 

The worst part is the stop is located where snooze previously was on the screen. Stop was at the bottom not the middle. It took me 3 days of over sleeping before I realized what the problem was. Thanks for helping me almost lose my job Apple!

I’m having the same issue. My iPhone XS is on charge and placed in a phone stand overnight. Last night I set my alarm and ringtone so high that everyone on my floor and the floor below me should be able to hear it. I have multiple alarms and my phone only did one of my earlier alarm which was extremely quiet and it played none of my other alarms. This morning I woke up an hour late and I clicked on the screen to see one alarm that has snoozed by itself. I’ve missed so many days I don’t know what to do!!!!!! How do we get apple to fix their mistake!

I did a quick test where I set an alarm and left it (without standby mode) and it worked perfectly fine. Then, I put an alarm on and set my phone on standby mode. My screen showed that my alarm is playing but there was no sound at all! How do we get Apple to fix this?

I thought I was going crazy. For me I never even touched my phone in the morning my alarms (I set 3) didn’t go off at all. I’m a light sleeper and can wake up to just the sound of my phone on vibrate. So I knew I didn’t sleep through it. I made volume louder and still had the same problem. I finally figured out how to turn the stand by mode off. It sucks because it was a cool feature, but I need to get up on time. Hopefully they fix this problem soon.

You’re not alone, I nearly lost my job because of this bug. Ever since iOS 17, never had an issue before. Happens on my iPhone 15 Pro Max and my spouses iPhone 13 Pro Max both on iOS 17.2.1 (started on iOS 17.0). Turned off StandBy, Face ID Awareness/Attention, DND, Sleep Focus, Volume Up, etc., but nothing works! If I set a test alarm or manually change the time on iPhone it works as it should, but the moment I set it “for real” I find out it’s 5am and my 3am alarm never went off yet when I tested my alarm before going to bed it was so loud it would wake the entire house up.

This is BEYOND infuriating for how much these phones cost that can’t even function as a simple alarm. What a joke.

This worked for me! I can now use StandBy correctly. Though it is insane that glancing at my phone to find the Snooze button before falling back asleep was apparently also telling my phone that I'm awake and aware enough to turn off my alarm ringer.

Just to confirm. At night, I place my phone on its side between 2 books on the bedside table.

After a system update, the useless standby mode, which I knew nothing about and is nothing to me, started killing the alarm clock.

Updating my Mac started giving me worry some years ago.

Apparently now updating the phone isn’t safe anymore.

Progress!

latest update did not fix… happened to me this morning (tested it out again since I didn’t have to get up at a certain time). If I lay my phone flat (face up) my alarm always works. If I lay it sideways (in standby). It never works!!! It’s 100% failure rate. Smh 🤦🏼‍♂️

congrats Apple on making my alarm didn’t work/go off . Excuse valid in 2024. 🫠