Articles on sleep inertia, smart alarms and waking up more gently, with the research behind them. From the makers of Jera, a gentle alarm clock for iPhone.https://jera.dayenhttps://jera.day/blog/why-does-my-alarm-scare-mehttps://jera.day/blog/why-does-my-alarm-scare-meJolted awake with a racing heart? Why a sudden alarm sets off a startle, what studies found about heart rate and blood pressure, and how to wake more gently.Mon, 02 Nov 2026 00:00:00 GMTRamit Mehraalarm soundsstartlesciencehttps://jera.day/blog/iphone-alarm-too-quiethttps://jera.day/blog/iphone-alarm-too-quietWhy an iPhone alarm sounds too quiet, which setting sets its volume in iOS 27 and 26, and what helps when it’s already at the top. With our own measurements.Tue, 27 Oct 2026 00:00:00 GMTAlex ParienkoiPhonealarmshow-tohttps://jera.day/blog/best-gentle-alarm-apps-iphonehttps://jera.day/blog/best-gentle-alarm-apps-iphoneWhich iPhone alarm apps start quietly and get louder? Wonderwake, Sleepwave, Alarmy, Sleep Cycle and more compared on rise, backups and price.Mon, 19 Oct 2026 00:00:00 GMTKyrylo DemaiPhonealarmsappshttps://jera.day/blog/why-do-i-sleep-through-my-alarmhttps://jera.day/blog/why-do-i-sleep-through-my-alarmSleeping through alarms usually comes down to deep sleep, sleep debt and the sound itself. What research says makes people hard to wake, and what helps.Mon, 12 Oct 2026 00:00:00 GMTRamit Mehraheavy sleepersalarmssleep debtsciencehttps://jera.day/blog/what-makes-a-good-alarm-soundhttps://jera.day/blog/what-makes-a-good-alarm-soundMelodic or beeping, high or low, loud or rising? Here’s what research says about alarm sounds that wake you gently, and the ones that wake you reliably.Thu, 08 Oct 2026 00:00:00 GMTRamit Mehraalarm soundssleep inertiasciencehttps://jera.day/blog/wake-up-early-night-owlhttps://jera.day/blog/wake-up-early-night-owlNight owls are real, but the body clock can move. Here’s what a trial that shifted night owls two hours earlier actually did, and how to try it yourself.Mon, 05 Oct 2026 00:00:00 GMTRamit Mehranight owlschronotypelightsciencehttps://jera.day/blog/dark-winter-morningshttps://jera.day/blog/dark-winter-morningsWhen sunrise slips past your alarm, waking up gets harder. What research says about dark mornings, the time change, and sunrise alarm clocks.Fri, 02 Oct 2026 00:00:00 GMTRamit Mehradark morningslightdaylight saving timesciencehttps://jera.day/blog/do-sleep-cycle-alarms-workhttps://jera.day/blog/do-sleep-cycle-alarms-workSmart alarms promise to wake you in light sleep so you feel less groggy. What the research says, and how well phones and watches really track sleep stages.Tue, 29 Sep 2026 00:00:00 GMTRamit Mehrasmart alarmssleep inertiasciencehttps://jera.day/blog/iphone-alarm-get-louder-graduallyhttps://jera.day/blog/iphone-alarm-get-louder-graduallyThe iPhone’s Clock app can’t make an alarm fade in. Here are the options that do work in iOS 27 and 26, from Shortcuts to alarm apps, and what each one can’t do.Sat, 26 Sep 2026 00:00:00 GMTAlex ParienkoiPhonealarmshow-tohttps://jera.day/blog/sleep-inertiahttps://jera.day/blog/sleep-inertiaGroggy for the first half hour after your alarm? That’s sleep inertia. Here’s what causes it, whether snoozing makes it worse, and what actually helps.Wed, 23 Sep 2026 00:00:00 GMTRamit Mehrasleep inertiasnoozescience