01. Audio Engine
We don't use simple looped MP3s. Our audio engine is built directly on the Web Audio API, generating procedural soundscapes in real-time.
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✓Pink & Brown Noise Generation Mathematically generated 1/f noise filters to mask distracting frequencies without causing auditory fatigue.
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✓Binaural Beat Entrainment Dual oscillators generate a 40Hz Gamma difference tone, scientifically associated with high-level cognitive processing.
02. Canvas PiP
Standard browser Picture-in-Picture only works for video elements. We bypass this limitation by dynamically rendering the timer state to an HTML5 Canvas and capturing it as a video stream.
Why this matters
This allows the timer to float outside the browser window, hovering over your IDE, design tool, or reading material. It ensures the timer is always visible without occupying screen real estate.
Memory Efficient
03. Sequence Logic
Productivity isn't one-size-fits-all. Our Sequence Editor allows for Turing-complete workflow definitions. Create loops, nested patterns, and custom intervals.
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✓HIIT for the Brain Configure Tabata-style intervals (e.g., 10m focus, 2m break, repeat 4x) to maintain high-intensity cognitive output.
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✓Ultradian Alignment Supports long-cycle work (90m work / 20m rest) aligned with natural human biological rhythms (BRAC).
04. Zero-Knowledge
We believe productivity tools shouldn't harvest your data. FocusTimer has no backend database for user data.
State Transfer via URL
When you share a sequence, we JSON-stringify the configuration, compress it, Base64 encode it, and append it to the URL. The data exists only in the link itself.
IndexedDB Persistence
Your history and templates are stored locally in your browser's IndexedDB. Clearing your browser data wipes the slate clean. We cannot see your data even if we wanted to.
Privacy by Design
No tracking cookies. No analytics on sequence contents. No account required.