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Smart Alarm Clock

Professional browser-based alarm system with cognitive wake-up challenges, polyphasic sleep timers, and circadian rhythm optimization.

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About

This is not just a clock; it is a Circadian Alignment Tool designed for professionals who cannot afford to oversleep. While standard system alarms are easily dismissed via muscle memory, this tool combats Sleep Inertia (the groggy state upon waking) by requiring cognitive engagement to silence the signal. We utilize the Web Audio API for synthesized, non-repeating audio frequencies that prevent auditory habituation.

The system features a Drift-Corrected Chronometer. Unlike standard setTimeout functions which can drift by seconds over hours due to browser throttling, this tool re-calibrates against the system's atomic time every 100ms. It includes specific presets for Polyphasic Sleep cycles (Uberman, Dymaxion) and NASA-verified power naps. The "Night Mode" utilizes specific hex codes (#000000 background, #B00000 text) to minimize blue light exposure, preserving melatonin production.

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Formulas

To ensure wakefulness, the Cognitive Challenge Load (L) is calculated to exceed the threshold of autonomic motor function. The probability (P) of accidental dismissal is minimized by the formula:

P ≈ 1ln(C × t)

Where C is complexity and t is time to solve. The audio volume (V) ramps up logarithmically:

V(t) = Vmax × (1 − e−kt)

This ensures that the sound becomes impossible to ignore without causing immediate auditory shock.

Reference Data

Cycle TypeDuration (t)Brain State targetRecommended Freq.
NASA Power Nap26 minStage 2 (Spindles)400 Hz (Sine)
Full REM Cycle90 minComplete Cycle432 Hz (Nature)
Deep Sleep (SWS)4.5 hoursCellular Repair528 Hz (Gentle)
Caffeine Nap20 minAdenosine Flush800 Hz (Square)
Siesta60 minSWS Entry (Caution)600 Hz (Sawtooth)
Uberman Core20 minREM ReboundLOUD
Everyman Core3.5 hoursSWS + REMGRADUAL
Sleep Latency15 minAlpha to Theta wavesN/A

Frequently Asked Questions

We use Procedural Audio Synthesis. Instead of playing a static MP3 file, the browser generates sound waves in real-time. This allows us to slightly vary pitch and modulation, preventing your brain from "tuning out" the noise.
Solving a math problem requires the activation of the Prefrontal Cortex, the part of the brain responsible for executive function. This effectively snaps the brain out of the Theta-wave dominant state associated with sleep inertia.
No. Browser security protocols require the tab to be open to execute code. However, our "Wake Lock" integration prevents the system from sleeping as long as the tab is active.
A 1995 NASA study found that a 26-minute nap improved pilot performance by 34% and alertness by 54%. This preset sets a timer for exactly 26 minutes plus an estimated 7 minutes for sleep latency (falling asleep).
We use LocalStorage to save your active alarms on your device. No data is sent to any server. Your sleep habits remain private.