Slo vs Dark Noise: Which Ambient Sound App Fits? (2026)

Choose Slo if you need Android or want to listen free in the browser before installing anything; choose Dark Noise if you run Apple hardware and want Siri Shortcuts, interactive widgets and Apple Intelligence Magic Mixes.

Disclosure: Slo is made by the team publishing this comparison. Dark Noise facts come from its current official App Store listings, checked July 31, 2026. We have not performed a controlled product test, and we do not claim that either app improves sleep or focus for everyone.

The short verdict

Choose Slo if Android or immediate browser listening matters, or if you want curated ambient layers without installing an app first. Choose Dark Noise if you live in the Apple ecosystem and value Siri Shortcuts, interactive widgets, themes, alternate icons, and Apple Intelligence-powered Magic Mixes.

Both provide ambient sounds and custom mixing. The real decision is broader access versus deeper Apple integration.

Slo vs Dark Noise at a glance

Decision	Slo	Dark Noise
Verified catalogue	151 curated sounds	50+ sounds
Mixing	Adjustable browser mixer and presets	Custom mixes in the app
Browser option	Yes	No official web player found
Mobile platforms	iOS and Android download paths	iPhone and iPad
Desktop	Mac download path	Mac app
Apple integration	No verified parity claim	Siri Shortcuts, AirPlay, interactive widgets
Visual customization	No verified themes/icons claim	10 themes and 20+ Home Screen icons
Newer differentiator	Curated browser presets	Apple Intelligence Magic Mixes
Pricing	Check current store terms	Check current App Store terms

We avoid exact prices because App Store amounts and entitlements can change by region. Dark Noise’s listing currently shows an app with in-app purchases; verify the checkout screen for the feature you need.

What Slo offers

Slo’s current product source describes 151 curated sounds for sleep, focus, and relaxation. The website provides individual players with volume and timer controls, a multi-layer mixer, and curated presets. This makes it possible to test brown noise, white noise, rain, rivers, and other layers in a modern browser before choosing an app.

Slo provides download paths for iOS, Android, and Mac. That does not establish identical features on all three platforms, and this comparison does not claim offline playback, cross-device sync, widgets, or Siri parity.

What Dark Noise offers

Dark Noise is an Apple-platform ambient sound app for iPhone, iPad, and Mac. Its current App Store listing states 50+ sounds, custom mixes, a fade timer, AirPlay, Siri Shortcuts, interactive Home Screen and Lock Screen widgets, 10 themes, and more than 20 Home Screen icons.

The listing also reflects a major update since older comparisons were written: Dark Noise 3.5 added an iOS 26 design and Magic Mixes, which use Apple’s on-device Foundation Model to create a soundscape from a prompt. That feature depends on compatible Apple Intelligence availability and should not be confused with a guarantee about the resulting mood or sleep outcome.

Dark Noise is not listed for Android. Its Mac listing adds desktop-specific features such as a mini player, keyboard shortcuts, menu-bar support, and widgets.

The differences that matter

Android and browser access

Slo is the practical first test for an Android user because it has an Android download path and browser playback. Dark Noise is focused on Apple devices. If you only use Apple hardware, that limitation may not matter; if your phone is Android, it decides the comparison immediately.

Apple system integration

Dark Noise’s advantage is not simply its sound count. Siri Shortcuts, AirPlay, interactive widgets, Lock Screen controls, and Mac utilities can put playback closer to daily Apple workflows. Slo’s verified website facts do not establish equivalent integrations, so the feature table says “not verified” rather than making a broad negative claim.

Mixing and AI-assisted creation

Both products can combine sounds. Slo exposes adjustable layers and curated presets in the browser. Dark Noise offers custom mixes and, on compatible current Apple systems, Magic Mixes generated from a prompt. Choose based on whether you want to set known ingredients yourself or ask the app to propose a scene.

Catalogue size and curation

The verified counts are 151 for Slo and 50+ for Dark Noise. A numerical lead does not prove a better library. Check whether the exact noise color or environment you use is present and whether its loop and balance feel comfortable.

Visual customization

Dark Noise officially lists 10 themes and more than 20 Home Screen icons. This is meaningful if the app’s appearance and widget setup are part of your routine. Slo’s public product facts emphasize sounds, browser players, mixes, and presets—not visual theme customization.

Which one should you choose?

Your priority	Better first test	Why
Android phone or tablet	Slo	Dark Noise is not listed for Android
Listen before installing	Slo	Browser players, mixer, and presets are live
Siri and Apple automation	Dark Noise	Shortcuts and voice start are official features
Home or Lock Screen widgets	Dark Noise	Interactive widgets are part of the listing
Prompt-generated soundscapes	Dark Noise	Magic Mixes uses Apple Intelligence
Manual browser layer mixing	Slo	The mixer exposes each layer directly
Apple-only setup with strong visual customization	Dark Noise	Themes and alternate icons are explicit features

If the goal is sleep, compare either app with silence and use the lowest level that masks the actual disturbance. A larger library or smarter shortcut does not establish better sleep. See how sound affects sleep quality for a safer test.

Slo sleep presets

Compare bright masking with a deeper base

The first mix targets varied apartment noise. The second puts more weight in low frequencies. Keep the lowest comfortable balance.

White Noise and Ocean for Noisy Apartments

Broad noise coverage with ocean movement for uneven building sounds.

• White Noise 66%
• Ocean Waves 35%

Play this mix View details

Rain and Brown Noise for Deep Sleep

A low, steady foundation softened by the natural detail of rainfall.

• Brown Noise 65%
• Rain 38%

Play this mix View details

Frequently asked questions

Is Slo a Dark Noise alternative for Android?

Yes for ambient playback and mixing. Slo has an Android download path and browser tools; Dark Noise’s official listing is for iPhone, iPad, and Mac.

Does Dark Noise work on Mac?

Yes. Its official Mac App Store listing includes custom mixes, a mini player, timer, keyboard shortcuts, menu-bar support, themes, and widgets.

Can I use Dark Noise in a browser?

We did not find an official browser player in the current product listing. Slo has verified browser players, a mixer, and presets. Check Dark Noise’s current site if browser access is essential.

What are Dark Noise Magic Mixes?

The App Store says they use Apple Intelligence and Apple’s Foundation Model to create a soundscape from a prompt. Availability depends on compatible Apple hardware and software.

Which app has more sounds?

Slo’s current product source says 151 curated sounds; Dark Noise’s listing says 50+. Counts do not measure recording preference, integration quality, or whether a specific sound fits your room.

Official sources checked July 31, 2026

• Dark Noise, official iPhone/iPad App Store listing — 50+ sounds, mixes, timer, Siri Shortcuts, widgets, themes, icons, platform support, and Magic Mixes update.
• Dark Noise, official Mac App Store view — Mac mini player, shortcuts, menu-bar support, mixes, timer, themes, and widgets.
• Slo, live browser players, mixer, presets, and current product source — claims checked July 31, 2026.

Related comparisons and guides

• Slo vs White Noise
• Best white noise apps
• Complete guide to noise colors
• Slo vs myNoise

Filip Kowalski is the developer of Slo and writes about sound, sleep, and focus.