# Sereno: Sleep Sound Machine — White & Brown Noise, Rain, Fan

> White & Brown Noise, Rain, Fan (iPhone/iPad app by Guan Feng Lai.)

- Source: https://appshunter.io/ios/app/sereno-sleep-sound-machine/id6788236641 (this page in markdown: same URL + `.md`)
- Developer: [Guan Feng Lai](https://appshunter.io/developer/1136144960)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 66 MB
- Languages: Arabic, Bangla, Catalan, Croatian, Czech, Danish, Dutch, English, Finnish, French and 34 more
- Released: 2026-07-08
- Data updated: 2026-10-28

## What is Sereno?

Optimized for iPhone Duo. Built with the latest SDK, the app fills the entire inner display and automatically adjusts its layout whether the device is folded or open.

Sereno turns your iPhone into a sleep sound machine: layer rain, ocean, fire, fans and white, pink or brown noise, and set each layer's volume to build your own mix.
Nature sounds are real field recordings that reshuffle as you listen — never a fixed loop — and 1000+ ready-made blends give you a place to start.
A sleep timer fades out gently, a sunrise wake-up greets you with birdsong, and playback keeps going offline and on the lock screen.

— DOZENS OF SOUNDS, 1000+ BLENDS —
Nature and ambient sounds are real field recordings, re-sequenced at random as you listen, while colored noise is generated live on your device. Start with dozens of living sounds — colored noise (white, pink, brown), rain, ocean, wind, streams, fire, night crickets, fans, and more — then layer and tune them into over 1000 unique soundscapes. Every play takes a fresh path through the recordings.

— UNLIMITED MIXING —
Layer as many sounds as you like. Set the volume, balance, and EQ of every track to build your perfect mix — thunder over a crackling fire, rain on a tent, a fan behind soft brown noise.

— EVERY SCENARIO —
Ready-made scenes like Rainy Night, Deep Sleep, Steady Focus, Study Session, Meditation and Red-Eye Flight. Save and name your own.

— GENTLE SLEEP TOOLS —
A sleep timer that fades out softly instead of cutting off, plus a sunrise wake-up that gently brings in birdsong at the time you choose.

— FOCUS —
Steady brown and pink noise gives you an even background sound for work, reading, and study, with dedicated focus scenes.

— MADE TO FEEL CALM —
A serene, dark design with slow, gentle motion and soft color themes. Background playback, lock-screen controls, and a full-screen night view that dims the display.

— PRIVATE BY DESIGN —
No tracking, no ads, no account, no data collected. Everything stays on your device.

Some sounds, scenes, and features are unlocked with a one-time in-app purchase.

No ads. No account. Works fully offline.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Sereno Pro | $4.99 | one-time |


## Is Sereno safe?

Not enough ratings yet to assess Sereno.

## Is Sereno legit?

Sereno: Sleep Sound Machine appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Sereno is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.1.2 — 2026-10-27

Optimized for iPhone Duo: truly full screen. Improved how text is displayed across all languages, along with stability and performance improvements.

### 1.1.1 — 2026-10-18

Free sounds now include white noise, brown noise, rain, ocean waves and a fan. A new “Pick up where you left off” card brings back your last mix and timer in one tap. Clearer wording throughout and larger small text.

### 1.1.0 — 2026-10-08

Optimized for iPhone Duo.

Sereno now plays real field recordings. Rain, ocean, wind, fire, birds and more are recorded in real places and woven together at random, so you never hear a fixed loop. White, pink and brown noise are still generated live on your device, now with a more natural stereo sound.

### 1.0.7 — 2026-09-30

This update refreshes our App Store information. Everything in the app works the same as before.

### 1.0.6 — 2026-09-28

Improved how text is displayed across all languages, along with stability and performance improvements.

## Apps similar to Sereno

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Lull: White Noise & Rain Sleep](https://appshunter.io/ios/app/lull-white-noise-and-rain-sleep/id6787627523) | — | Free | Health & Fitness |
| [DaoBrew](https://appshunter.io/ios/app/daobrew/id6759587123) | — | Free | Health & Fitness |
| [HealthySleep: Calm & Relax Mix](https://appshunter.io/ios/app/healthysleep-calm-and-relax-mix/id6759452458) | 5.0 (1) | Free | Health & Fitness |
| [Noctura: Sleep Sounds & Focus](https://appshunter.io/ios/app/noctura-sleep-sounds-and-focus/id6786475727) | — | Free | Health & Fitness |
| [Peace and Quiet](https://appshunter.io/ios/app/peace-and-quiet/id1523600887) | 5.0 (1) | Free | Health & Fitness |
| [Period Tracker & Cycle: Raheva](https://appshunter.io/ios/app/period-tracker-and-cycle-raheva/id6790180153) | — | Free | Health & Fitness |

## More apps by Guan Feng Lai

- [HoursTag: Hours to Buy](https://appshunter.io/ios/app/hourstag-hours-to-buy/id6754218117)
- [G+Money: Spending & Budget](https://appshunter.io/ios/app/g-plus-money-spending-and-budget/id6755782939)
- [Lumi Bopomofo](https://appshunter.io/ios/app/lumi-bopomofo/id6773017109)
- [Lumi Bopomofo Pro: Zhuyin](https://appshunter.io/ios/app/lumi-bopomofo-pro-zhuyin/id6775773117)
- [Lumi Math Pro: Kids Numbers](https://appshunter.io/ios/app/lumi-math-pro-kids-numbers/id6776958488)
- [Lumi Math Planet: Explorer](https://appshunter.io/ios/app/lumi-math-planet-explorer/id6778269699)

All apps by Guan Feng Lai: https://appshunter.io/developer/1136144960

## Related topics

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

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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 2026-10-28.*