dpli: Focus & Sleep Noise

Your brain detects looping audio in minutes. Once it finds the pattern, your focus breaks. dpli has no file, no loop, no pattern to find — every sound is generated mathematically, in real-time, on your device.
Most focus apps play the same MP3 on repeat. Your auditory cortex is hardwired to detect repetition — it's a survival mechanism. The moment your brain maps the loop, the masking effect collapses. That's why your noise app stops working after a few days.
dpli is different. It synthesizes noise from scratch using mathematical algorithms. The sound never existed before you pressed play, and it will never exist again. There is nothing to detect, nothing to habituate to. Just a continuous, evolving acoustic environment that lets your mind stay in deep work.
BRAIN-TESTED PRESETS
Every preset in dpli is validated against a neural mass model — a mathematical simulation of how populations of neurons respond to acoustic input. We don't guess what sounds good. We test what works at the cortical level, and only the configurations that drive sustained, distraction-resistant cognitive states make it into the app.
Each preset is a spatial noise composition — multiple noise sources placed in 3D space around your head using HRTF processing. Your brain perceives each source as coming from a specific direction and distance, not from flat stereo speakers.
· Shield — A steady pink-noise cocoon that masks speech and softens sudden sounds. Symmetric placement signals safety. Built for long, uninterrupted sessions.
· Flow — Asymmetric spatial architecture designed to drive focused productivity. Hemispheric specialization keeps your brain engaged without fatiguing it.
· Deep Relax — Moving sources on prime-speed orbits prevent neural adaptation. Low-frequency brown noise provides a calming anchor for recovery between work blocks.
NOISE COLORS FOR EVERY TASK
Different noise spectra feed different parts of your auditory cortex:
· Pink Noise (1/f) — Distributes evenly across frequency bands. Ideal for creative work and long writing sessions. Less fatiguing than white noise over time.
· Speech-Shaped Noise — Spectrum matched to the long-term average of human speech. The most effective mask against intelligible voices in open offices and cafés.
· Brown Noise — Steep high-frequency roll-off. A low-energy acoustic anchor for analytical work or calming a racing mind.
· White Noise — Broad, flat spectrum. High-frequency energy drives alertness for tasks requiring sharp attention.
Volume sweet spot: 60–70 dB. Work in 60–90 minute blocks with silence between them.
100% OFFLINE. ZERO DATA. EVER.
Every wave of noise is computed on your device's processor. No audio is downloaded. No data is transmitted. No account is required.
· No internet connection needed — works on flights, in remote locations, in air-gapped offices
· No tracking of sessions, location, or usage patterns
· No cloud sync, no analytics, no phone-home features
· Privacy-by-design — ideal for classified, legal, medical, or confidential work
BUILT FOR YOUR ECOSYSTEM
dpli runs natively on iPhone, Mac, and Apple Watch. Start a session from your wrist. Continue on your desk. The same synthesis engine, optimized for each platform.
WHY DPLI EXISTS
We built dpli because we couldn't find a focus tool that respected how the brain actually works. Looping audio is a shortcut that fails. Generative noise — computed fresh, validated against neural models, spatially rendered — is the solution. No subscriptions to sound libraries. No dependence on servers. Just mathematics, running on your hardware, producing sound that works.
dpli isn't a sound app. It's a focus instrument.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/