Open Source

Reef

Stay focused. Block distractions. Own your screen time.

KotlinJetpack ComposeMaterial YouAndroid

An open-source digital wellbeing app that blocks distracting apps, sets daily routines, and provides screen time insights — without ads, clutter, or tracking. Built with Material You design principles.

Key Features

• Per-app blocking with customizable schedules
• Daily routine and focus mode management
• Screen time analytics and insights
• Material You dynamic theming
• No ads, no tracking, fully open source

Screenshots

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Reef home dashboard: Daily screen time trends, active routine timeline, and focus state
Per-app daily time allowances and gentle notification threshold settings
Automated focus routines: schedule distraction blocks across custom days and hours
Interactive hourly usage breakdowns and historical behavioral analytics
Pomodoro focus timer with configurable work-to-break intervals and system DND trigger
Mindful Launch: A deliberate breathing pause before opening compulsive apps

Design Philosophy & Wellbeing Engineering

Commercial digital wellbeing tools frequently introduce gamification gimmicks, subscriptions, or intrusive data collection. Reef was built to solve compulsive screen usage transparently: zero advertisements, zero tracking telemetry, zero subscriptions, and complete offline privacy.

Core Focus Mechanics

Routines & Time Blocks

Construct recurring time windows that restrict high-friction applications while keeping communication tools available.

Mindful Launch

Introduces a configurable friction pause (e.g. 5-second breathing countdown) before launching distracting apps, breaking reflexive muscle memory.

Pomodoro & Count-Up Modes

Supports traditional interval work cycles as well as open-ended count-up timers with configurable work-to-break ratio calculations.

Material You Expression

Crafted following Material 3 Expressive guidelines, incorporating organic shapes, smooth transitions, and dynamic contrast ratios.

Technical Specifications

Stack: 100% Kotlin with declarative Jetpack Compose UI architecture
Background Engine: Battery-efficient WorkManager jobs for scheduled routine transitions
Distribution: Published independently on IzzyOnDroid and Weblate for community localization
Privacy: All usage statistics remain strictly on-device inside encrypted SQLite databases