# Ocluv — Pure Focus and Deep Sleep

> Pure Focus and Deep Sleep (iPhone/iPad app by Chelone Labs, LLC.)

- Source: https://appshunter.io/ios/app/ocluv/id6759541142 (this page in markdown: same URL + `.md`)
- Developer: [Chelone Labs, LLC](https://appshunter.io/developer/1876701485)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.5 · 3 MB
- Languages: American English
- Released: 2026-04-04
- Data updated: 2026-06-09
- User reviews in markdown: https://appshunter.io/ios/app/ocluv/id6759541142/reviews.md

## What is Ocluv?

Ocluv is a scientifically calibrated audio engine designed for those who demand peak cognitive performance and restorative rest. Unlike standard apps that play predictable, looping MP3s, Ocluv synthesizes sound in real-time at 44,100 samples per second.

The human brain is an expert at pattern recognition. When it detects a loop in a standard audio file, it breaks your deep work or sleep cycle. Ocluv uses a mathematical engine to ensure you never hear the same pattern twice, preventing "audio fatigue" indefinitely.

THE SCIENCE OF SOUND

Based on peer-reviewed research from sources like Nature, PMC, and Frontiers, Ocluv synthesizes specific frequency distributions to target distinct cognitive states:

• Focus & Calm (Volcanic Brown): Mimics deep rumbling to support focus for active minds and promote restorative delta-wave sleep.
• Memory Consolidation (Airy Pink): A balanced harmonic spectrum mathematically optimized to enhance memory retention during deep sleep.
• Deep Focus (Arctic Azure): Uses high-frequency bias to mask speech bands, helping the pre-frontal cortex maintain sustained attention.
• De-stress & Relax (Emerald Green): Mimics nature’s mid-range resonance to promote a general sense of relaxation and calm.

DESIGNED FOR FOCUS, NOT DISTRACTION

Ocluv is built as a precision tool, not an attention trap.

• One-Tap Sleep Protection: Launch Ocluv and it instantly resumes your last session. No need to stare at a bright screen, preserving your melatonin for better sleep.
• Smart Session Timer: Set an 8-hour block for full-night protection or choose 30m/1h/3h for sprints.
• Ultra-Lightweight: Since the sound is generated by code, the app takes up almost zero storage space.
• Minimalist Interface: Zero ads, zero social feeds, and zero gamification.
• Battery Efficient: Optimized for minimal CPU usage during all-night sessions.

100% PRIVATE & OFFLINE

All processing happens directly on your device. No data collection, no internet required, and no account needed. Your peace of mind is absolute.

Features at a Glance:

• Generative Engine: Real-time synthesis; never hear the same pattern twice.
• Educational Insights: Learn the physiological benefits of each frequency.
• Background Play: Use other apps while your soundscape runs.
• Offline First: Works anywhere, even in airplane mode.

SIMPLE PRICING

$0.99 / month $9.99 / year (Includes 7-day free trial) $29.99 / Lifetime Purchase

To learn more about Ocluv, visit https://ocluv.app

Terms of Use: https://ocluv.app/terms

MEDICAL DISCLAIMER: Ocluv is designed for relaxation, focus, and general wellness. It does not provide medical advice, diagnosis, or treatment. Ocluv is not a substitute for professional medical care. Please seek a doctor’s advice in addition to using this app and before making any medical decisions.

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Ocluv Annual | $9.99 | per year |
| Ocluv Monthly | $0.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Ocluv Lifetime | $29.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-04-04

No release notes.

## Related topics

[ocluv](https://appshunter.io/ios/topics/ocluv)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-09.*