In general, as long as your iPhone is switched on, settings like Do Not Disturb or Focus Mode won’t affect the alarm. Your iPhone can even be in sleep mode, and it won’t harm your chances of hearing the sound. However, while the built-in clock app’s alarms won’t be affected by these settings, third-party apps are beholden to your iPhone app restrictions. Therefore, if you are using multiple alarm apps, it’s possible that they unintentionally impact each other’s performance. So, if possible, only stick to one alarm app at a time.
If you’re determined to use a third-party alarm app, there are a couple of settings you should keep an eye on. According to Alarmy, a third-party alarm app, its alarm sound may not work if you force quit the app while your iPhone is in silent mode. In addition, Alarmy notes that you’ll need to give it permission in all the different modes so that it can bypass the restrictions and send alerts.
Furthermore, you can check the official help pages or ask for the support of your specific alarm app’s developer. In some cases, developers need time to catch up with operating system updates and resolve new issues that their own alarm app’s updates have caused. Alternatively, deleting the third-party alarm app and downloading it again can also help resolve your problem. However, if you can’t pinpoint which app is causing the problem, you can also reset your iPhone settings.
