I built this app because I wanted to wake up in time for shul on Shabbat.
Set your alarms before Shabbat. When the time comes, the alarm rings and then stops on its own. No buttons, no touching the phone. It is free, has no ads, and works in English and Hebrew.
Newer versions added auto-snooze, so the alarm rings again a few minutes later and you do not oversleep, plus custom alarm sounds and Siri. You can ask Siri when your Shabbat alarms are, or have it set one for you. Before Shabbat, of course.