Slo vs Dark Noise: Premium Noise Apps Compared (2026)

Overview

Slo and Dark Noise are both premium noise apps designed for sleep, focus, and relaxation. While they share the core purpose of providing ambient sounds, they differ in platform strategy and integration depth. Dark Noise is built exclusively for the Apple ecosystem with deep system-level integration including Siri Shortcuts, widgets, and extensive customization options. Slo is a cross-platform app available on iOS, Android, and macOS with a focus on sound mixing. This comparison covers the features, integrations, and pricing of both apps.

What Slo Offers

Slo is a cross-platform ambient sound app focused on sleep, focus, and relaxation. The app provides 70+ sounds including noise types (brown, white, pink), nature recordings, and atmospheric audio. The core feature is the sound mixer, which allows users to combine multiple sounds at individual volume levels.

Slo is available on iOS, Android, and macOS, making it accessible to users regardless of which mobile platform they use. The app includes a sleep timer and uses a minimal interface centered on the mixing experience. A free tier provides access to select sounds, with premium unlocking the full library.

The app prioritizes cross-platform availability and sound mixing functionality. It does not include system-level integrations like Siri Shortcuts or home screen widgets.

What Dark Noise Offers

Dark Noise is an ambient noise app designed exclusively for the Apple ecosystem. The app is available on iOS and macOS and includes 50+ sounds covering noise types, nature, and atmospheric recordings. Dark Noise includes a mixer for combining sounds, similar to Slo.

What distinguishes Dark Noise is its deep integration with Apple’s platform features. The app supports Siri Shortcuts, allowing users to trigger specific sounds or mixes through voice commands or automation. Home screen and Lock Screen widgets provide quick access to favorite sounds without opening the app. Dark Noise also supports Focus filters, allowing different sound configurations to activate based on the user’s current Focus mode.

Customization is a significant part of Dark Noise’s identity. The app offers 20+ custom themes that change the visual appearance of the interface, and 20+ alternative app icons for the home screen. These options allow users to personalize the app’s look to match their preferences.

Dark Noise offers 8 sounds for free, with a subscription at $19.99 per year unlocking the full sound library and all customization options. The app is not available on Android or Windows.

Key Differences

Platform Strategy

This is the most significant difference between the two apps. Slo is cross-platform, available on iOS, Android, and macOS. Dark Noise is Apple-only, available on iOS and macOS. Users with Android devices or mixed-platform households would need Slo. Users fully invested in the Apple ecosystem may appreciate Dark Noise’s deeper integration.

Apple System Integration

Dark Noise includes Siri Shortcuts for voice-activated sound playback and automations, home screen and Lock Screen widgets for quick access, and Focus mode integration. These features allow Dark Noise to feel deeply embedded in the iOS experience. Slo does not currently offer these system-level integrations.

Customization

Dark Noise provides 20+ themes and 20+ custom app icons, giving users control over the visual presentation of the app. This level of aesthetic customization is uncommon in the noise app category. Slo uses a consistent design without user-customizable themes or icons.

Sound Library

Slo offers 70+ sounds, while Dark Noise offers 50+. Both include standard noise types and nature recordings. Slo’s larger library provides more variety for mixing, while Dark Noise’s curation focuses on quality sounds that work well with its system integrations.

Pricing

Dark Noise is priced at $19.99 per year with 8 free sounds. Slo offers a free tier with select sounds and a premium subscription. Both use subscription models, though the specific pricing and free content differ. Dark Noise’s price point reflects its Apple-ecosystem features and customization options.

Sound Mixing

Both apps include sound mixing capabilities. Users can layer multiple sounds at different volumes in either app. The core mixing experience is comparable, with differences appearing in how mixes integrate with system features (Dark Noise allows triggering mixes via Siri or widgets).

Android Availability

Slo is available on Android; Dark Noise is not. For Android users or households with mixed device ecosystems, this is a deciding factor. Dark Noise has no plans for Android availability as its development is focused on Apple platform integration.

Which App Is Right for You?

If you use Android devices, need cross-platform availability, or prefer a larger sound library with a straightforward mixing interface, Slo provides that experience. The app works across iOS, Android, and macOS, making it suitable for users who are not exclusively in the Apple ecosystem.

If you are fully invested in the Apple ecosystem and value deep system integration including Siri Shortcuts, widgets, Focus mode support, and extensive visual customization, Dark Noise provides a native Apple experience that goes beyond basic sound playback. The app is designed to feel like a natural extension of iOS and macOS.

Both apps provide quality ambient sounds with mixing capabilities and sleep timers. The choice primarily depends on platform needs and how much you value Apple system integration and customization options versus cross-platform availability and library size. For help choosing between different noise types, see our complete guide to noise colors.

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Information based on publicly available data as of April 2026. Visit the official Dark Noise and Slo app store listings for the most current details.

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