Features
Rubber Duck (DJ Quack)
Inspired by the legendary debugging technique from "The Pragmatic Programmer" by Andrew Hunt & David Thomas. When you're stuck on a problem, explain it step-by-step to a rubber duck — the act of articulating forces your brain to think clearly and often reveals the solution on its own.
How to activate
Open Settings (gear icon) → enable Rubber Duck. A duck button appears in the header. Tap it to summon DJ Quack.
12 Unique Skins
Browse with left/right arrows. From classic yellow to themed variations. Your pick is saved automatically.
Animated Affirmations
31 encouraging phrases with scale-up + particle explosion. 4 categories: listening, encouragement, approval, thinking. Appear every 12-30s while playing.
Baby Sleep Game
A relaxing falling-ducks game designed to help you and your baby fall asleep. Based on clinically validated psychology — not just a gimmick.
How to use
1. Enable in Settings → Baby Sleep Game
2. Activate Sleep Mode (moon icon in navbar)
3. Tap Sleep button → choose a playlist → set timer → Start
4. Ducks fall slowly — tap to catch. Screen dims over time. Drift off.
The science behind it
Cognitive Shuffle
Random visual stimuli (ducks at different positions, sizes, hues) prevent your brain from forming coherent anxious thoughts. Dr. Luc Beaudoin (SFU, 2015) showed this reduces sleep onset by 40-60%.
Bilateral Tapping
Repetitive tapping activates the parasympathetic nervous system (Porges Polyvagal Theory). The haptic vibration on catch reinforces this calming reflex.
Progressive Dimming
The screen gradually darkens from 0% to 95% over the timer duration — mimicking a natural sunset. This cues your brain to release melatonin.
Progressive Dimming
Screen gradually dims to near-black over the timer duration. Combined with sleep playlists (rain, forest, lullabies), this creates an immersive wind-down environment that signals your brain it's time to sleep.
Descending Stimulation
Ducks spawn less frequently and fall slower as the timer progresses. Your nervous system naturally follows the decreasing intensity toward sleep.
For parents with babies
The baby falls asleep from the music (lullabies, rain sounds). YOU fall asleep from the game — it keeps your hands busy so you don't scroll your phone (blue light = awake). Through co-regulation, your calm state helps the baby sleep faster. At the end: screen nearly black, music continues softly, both drift off.
Game controls
Built-in sleep playlists
Stars & Constellations Theme
Enable in Settings → Stars Theme. An animated night sky fills the background with twinkling stars, slow constellations, and occasional shooting stars. Combined with Sleep Mode and the duck game, it creates an immersive "falling asleep under the stars" experience.
More Features
Crossfade Playback
Smooth transitions between tracks (1-30s). Or enable gapless for instant switches.
A-B Loop per Track
Loop just the chorus, a solo, or any segment. Set loop count and what happens after.
Sleep Timer
15 min to 2 hours. Music fades out automatically. Perfect for bedtime.
30 Mood Playlists
Chill, Study, Gym, Baby, Rain, Forest, 528Hz, Meditation — tap your mood and music starts.
Per-Track Speed
0.25x to 2x on each track. Slow down for practice, speed up for energy.
100% Free, No Account
No ads, no trial, no credit card. Everything auto-saves in your browser.
