🌙

SleepMixBlueprint

Layer ambient sounds for better sleep, focus & calm

iOS · Android · Web React Native / Expo By Tynell Sene's
The Problem

Sleep is broken for millions

  • 1 in 3 adults don't get enough sleep — CDC, 2024
  • Ambient noise significantly improves sleep onset & quality
  • Existing apps lock you into a single track with no control
  • Kids and adults need very different sound profiles
🔊

One size doesn't fit all

Rain alone is too much. White noise alone is too harsh. People need to blend and balance.

👶

Kids are underserved

Most sleep apps are adult-focused. Parents need a safe, simple, child-appropriate interface.

Overview

A personal sleep soundscape studio

SleepMixBlueprint lets you layer multiple ambient sounds simultaneously, control each track's volume independently, and set a gentle fade-out sleep timer — all in one calm, distraction-free app.

9
Built-in Sounds
4
App Sections
3
Platforms
Custom Imports
Core Features

Everything you need to wind down

🎚️

Multi-track Mixer

Layer multiple sounds at once with per-track volume sliders for a fully custom blend.

⏱️

Sleep Timer

Set a duration and audio fades out gently — no jarring cut-offs mid-sleep.

📂

Custom Imports

Import any audio from your device. Files persist across updates and reinstalls.

🎧

Background Audio

Music keeps playing when the screen locks or a call comes in — on real devices.

Sound Library

9 user-owned tracks across 3 sections

All audio files are sourced from the app creator's own collection — no AI-generated or licensed content, no redistribution concerns.

🌙 Sleep / Ambient

Rain Birdsong Running Water Calm Melody

📚 Study / Focus

Lo-fi Focus White Noise

👶 Kids

Lullaby Soft Rain Heartbeat

✨ Custom

Import from device Tag by mood
App Sections

Four purpose-built modes

🌙

Mixer

Home screen. Layer built-in + imported sounds. Set timers. Full-volume control per track.

🎵

Library

Import, tag and manage your own audio files. Re-import warnings if files move or are deleted.

📚

Study

Pomodoro-style 25/5 work-break cycle with focus-optimised audio.

👶

Kids

Simplified parent interface, violet accent, short timer presets (15–45 min).

Tech Stack

Cross-platform from a single codebase

⚛️
React Native
v0.74 · iOS, Android, Web
🚀
Expo
SDK 51 · managed workflow
🔊
expo-av
v14 · audio engine
💾
AsyncStorage
Track metadata + prefs
🧭
React Navigation
v6 · bottom tabs
🔤
Expo Google Fonts
Inter — full weight range
🌈
Linear Gradient
Per-section backgrounds
📡
EAS Update (OTA)
Instant JS-layer fixes
Engineering

Solved the hard parts

Real-device reliability was the north star. Every feature was shipped with a matching fix for the edge case that breaks it in production.

  • Background audio — UIBackgroundModes + WAKE_LOCK keep sound alive through screen lock
  • Call interruption — Audio pauses on incoming calls and resumes cleanly after
  • Track persistence — Imports survive app updates and reinstalls via stable file URIs
  • Instant OTA updates — EAS Update delivers JS fixes to testers without a reinstall
  • Seamless looping — Zero-gap loops on all 9 built-in tracks
  • Accessibility — Respects system large-text settings; no fixed font sizes
  • Re-import warnings — Users are notified if a file moves or is deleted
Progress

What's shipped

Core mixer with multi-track layering & sleep timer

Kids section with violet UI, short timers, custom imports

Library: import, tag, delete, re-import warning

Onboarding (3-card intro, re-readable from settings)

Background audio, call interruption, screen-lock playback

Track persistence across updates · OTA delivery · branded icon & splash

Security: 4 high-severity dependency CVEs patched

TestFlight listing · lock-screen controls · Bluetooth reconnect

Portfolio · 2026

"A cross-platform mobile app that solves a real problem — shipped end-to-end, from concept to TestFlight."

React Native · Expo SDK 51 · expo-av · AsyncStorage · EAS Update · iOS / Android / Web

App
SleepMixBlueprint Blueprint
Creator
Tynell Sene's
Status
Beta · 2026
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