aka Alarm

aka Alarm wakes you at the right moment in your chosen window — not at an arbitrary fixed time.

Pick a wake-up window (any time, plus 30 minutes). Tap Start. aka Alarm listens to the ambient sound of your room and builds a rolling baseline of how quiet it really is. When the window opens, the first time you turn over, sigh, or shift the duvet, the alarm fires. If nothing happens, it fires at the end of the window so you never oversleep.

• Gentle wake-up — the alarm tone fades from 1 % to 100 % over a minute, so you come out of sleep gradually instead of being jolted.
• Smart snooze — lightly move the phone to snooze. The snooze duration is randomised between 60 seconds and 15 minutes, clamped to whatever's left of your window.
• On-device only — audio never leaves your phone. Nothing is recorded, stored, or transmitted. No accounts, no servers, no analytics.
• Built for modern Android — Material 3 with dynamic colours and dark-mode friendly.

How it works in one paragraph: the app continuously samples microphone input through a foreground service to compute the ambient sound level (in dBFS) and maintains a five-minute rolling baseline. Within the wake window, a level rise above the baseline by a configurable threshold triggers the alarm. The microphone is active only while an alarm is set. Audio samples are processed in memory and immediately discarded.

aka Alarm is open source under the MIT licence.

Recent changes:
Alarms now ring on time after a snooze: every timed step is armed as an exact system alarm, so deep sleep can't delay it.

New "Alarm sound" setting: pick one of your phone's alarm tones or any audio file. New built-in tone, "Cozy Morning Wake", and a fade-in that stays genuinely quiet for the first half minute.

Landscape and short screens: the time wheels stay aligned after rotating, and the Start button is always on screen.