# DroneLull - Fan Sleep — Fan & White Noise for Sleep

> Fan & White Noise for Sleep (iPhone/iPad app by 杰 向.)

- Source: https://appshunter.io/ios/app/dronelull-fan-sleep/id6762075264 (this page in markdown: same URL + `.md`)
- Developer: [杰 向](https://appshunter.io/developer/1860305678)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 1 MB
- Languages: English, Chinese
- Released: 2026-04-17
- Data updated: 2026-06-26
- User reviews in markdown: https://appshunter.io/ios/app/dronelull-fan-sleep/id6762075264/reviews.md

## What is DroneLull?

DroneLull procedurally generates the warm, mechanical hum of a fan, AC, refrigerator and other household appliances for background masking, relaxation, and steady room ambience. Keep volume low, especially around infants, children, or anyone with hearing sensitivity.

KEY FEATURES
• Procedurally generated audio (no audio files, tiny app size)
• Background playback for longer sessions
• Adjustable master volume
• Live spinning fan blade visualization
• Fully offline — no streaming, no ads, no account

INCLUDED SOUNDS
Free:
• Desk Fan — warm mid-frequency hum

Pro (6 sounds total):
• Stand Fan — slower, deeper rotation
• AC Unit — low-frequency mechanical hum
• Refrigerator — distant kitchen drone
• Vacuum — high-frequency white-pink rush
• Dryer — rhythmic tumbling drone

PRO FEATURES (optional subscription)
• All 6 procedural sounds unlocked
• Multi-layer mixer: blend any combination with independent volume sliders
• Low-pass cutoff fine-tuning (200–3000 Hz) for warmth control
• Sleep timer with smooth fade-out (5/10/15/30/45/60 minutes)
• Background playback can continue during screen lock
• Zero ads forever

HOW IT WORKS
DroneLull synthesizes brown noise (integrated white noise) in real time, applies a one-pole low-pass filter for warmth, and modulates amplitude with a slow LFO to mimic rotating blades. Different presets use different cutoffs and rates to recreate distinct appliance characters. No samples, no recording, no streaming.

PRIVACY
All audio is generated locally. No microphone, no recording, no network. No analytics, no ads, no account.


SUBSCRIPTION INFO
• Payment will be charged to your Apple ID account at confirmation of purchase.
• Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period.
• Your account will be charged for renewal within 24 hours prior to the end of the current period.
• You can manage and cancel your subscriptions by going to App Store → Account → Subscriptions.

Privacy Policy: https://frexx.top/dronelull/privacy.html
Terms of Use: https://frexx.top/dronelull/terms.html

SUPPORT
jie.xiang.jm@gmail.com

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| DroneLull Pro Weekly | $4.99 | per 7 days |
| DroneLull Pro Yearly | $29.99 | per year |



## Version history (last 4 releases)

### 1.0.5 — 2026-06-20

DroneLull now adds Scene Plan, a quick guide for each background-sound session with masking strength, cutoff tone, timer guidance, mix-layer context, stop conditions, and the next safe action. Existing presets, mixer controls, sleep timer, background audio, and Pro access stay intact.

### 1.0.2 — 2026-05-13

Improves review readiness, localization, privacy details, and stability based on the latest validation pass.

### 1.0.1 — 2026-05-07

Bug fixes and subscription review compliance improvements.

### 1.0 — 2026-04-17

No release notes.

## More apps by 杰 向

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- [零花钱 - PocketTask](https://appshunter.io/ios/app/pockettask/id6760774816)
- [新家管家](https://appshunter.io/ios/app/id6760828367)
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- [财产分割助手](https://appshunter.io/ios/app/id6760984479)

All apps by 杰 向: https://appshunter.io/developer/1860305678

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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 2026-06-26.*