The Audio Engine for
Deep Sleep
Construct your perfect sonic environment. No subscriptions. No data tracking. Just high-fidelity physics-based audio mixing.
Get it on Google Playv1.0.0 for Android 15+
of Sleep Apps are
User Hostile.
Most sleep apps require a monthly subscription just to play rain sounds. They track your location, sell your usage data, and drain your battery with unnecessary cloud syncing.
They treat your insomnia as a recurring revenue stream.
The Starlux Standard
Offline First
Download once, run forever. Starlux has zero server dependencies. If your internet cuts out, your sleep sounds don’t.
One-Time Purchase
No monthly rent. You own the tool.
Zero Tracking
We don’t know who you are.
Battery Optimized
Uses a custom Android Foreground Service to keep your CPU in deep sleep while audio plays.
Infinite Mixing Desk
Don’t settle for a pre-recorded loop. Layer up to 10 sounds simultaneously. Mix “Heavy Thunder” with “Pink Noise” and a “Box Fan.”
High-Precision Volume Control (0-100%)
Physics-Based Audio
We don’t just play MP3s. We use a custom Headroom Calculator to prevent digital clipping when you stack loud sounds.
Our volume sliders use a Square Law (x²) curve, matching how the human ear actually perceives loudness, giving you granular control at low volumes where it matters most.
The Sound Vault
High-fidelity recordings and mathematically generated noise.
Color Noise
White, Pink, Brown, Box Fan.
Waterways
Gentle Rain, Tin Roof, Ocean, River.
Nature
Forest Wind, Crickets, Owls.
Fire & Warmth
Campfire, Fireplace, Hearth.
Deep Drone
Airplane Cabin, Space Hum.
Decompress Before Sleep
Integrated breathing exercises with Haptic Feedback.
Close your eyes. Feel the vibration cues. Inhale… Hold… Exhale.
Does not kill your phone.
Other apps keep the screen awake or run heavy analytics threads. Starlux requests a “Partial Wake Lock”—keeping only the audio chip running while the rest of your phone sleeps.
Android 15 Native
MediaSession
Controls on your lock screen.
Audio Focus
Pauses automatically if you get a call.
Auto-Resume
Fades back in when the interruption ends.
The “Nuclear” Sleep Timer
Most apps rely on JavaScript timers that get killed by Android’s aggressive battery saver. Starlux injects a native AlarmManager intent into the OS.
When the timer hits zero, the audio stops. Guaranteed. No waking up at 3 AM to a thunderstorm.
The Privacy Manifesto
We are tired of “free” apps that cost your privacy. Starlux contains zero analytics. We don’t know which sounds you play. We don’t know how long you sleep. We don’t know your IP address.
The Landscape
| Feature | Calm / Headspace | Spotify | Starlux |
|---|---|---|---|
| Custom Mixing | No | No | Yes (10 Tracks) |
| Offline Mode | Requires Premium | Requires Premium | Default |
| Data Collection | High | High | Zero |
| Cost | $70/year | $120/year | Free / One-time |
“I built Starlux because I travel a lot. Hotel WiFi is unreliable, and streaming white noise killed my data plan. I wanted a tool that just worked—a Swiss Army Knife for sleep audio that lived entirely on my phone.”
— The Developer
Early User Feedback
“Finally, an app that lets me mix brown noise with a fan. Simple and effective.”
“The breathing exercise haptics are a game changer. I don’t even have to look at the screen.”
“Love that it doesn’t ask for my email.”