Slo vs Noisli (2026): Sound Mixers Compared

Choose Slo if you want a larger documented sound library and a native Mac download for pure ambient listening; choose Noisli if you want sound inside a focus workspace with a Markdown editor, session timer and Chrome extension.

Disclosure: I develop Slo. This comparison uses current official product pages rather than hands-on performance testing. Competitor details were checked on July 31, 2026.

Choose Slo if you want a larger documented sound library, a native Mac download, and quick browser players or presets. Choose Noisli if you want ambient sound inside a productivity workspace with a session timer, Markdown editor, playlists, and a Chrome extension. Both currently support Android.

Slo vs Noisli at a glance

Choose	Best fit	Main tradeoff
Slo	Layered ambient sound for focus, sleep, and quiet routines	No built-in text editor or productivity statistics
Noisli	A browser-first focus workspace with sounds, timer, and writing tools	Smaller documented library; the complete web feature set is intended for desktop browsers

This is not a universal winner. The practical question is whether sound is the whole tool you need or one part of a structured work environment.

Important correction: Noisli still supports Android

Noisli’s current official apps page lists both iOS and Android and describes offline sound access in the mobile apps. Earlier versions of this article incorrectly said the Android app had been discontinued. That claim is false and has been removed.

Noisli also remains available as a web app and Chrome extension. Its pricing page notes that the complete browser feature set is designed for modern desktop and laptop browsers.

What Slo offers

Slo centers on choosing, layering, and saving ambient sound combinations. Its documented library contains 151 curated sounds across noise colors, nature, household, and atmospheric categories. Browser visitors can use individual players with volume and timer controls, build layers in the mixer, or open curated presets.

Download paths are available for iOS, Android, and Mac. Because entitlements and features can differ by platform and store version, this comparison does not claim that every feature is identical everywhere.

Slo does not include a text editor, Pomodoro workflow, browser extension, or productivity statistics. It is a narrower sound tool.

What Noisli offers

Noisli combines an ambient sound mixer with focus-oriented tools. Its official feature page documents 28 sounds on Pro, curated playlists, saved combinations, oscillation, shuffle, an advanced session timer, and a distraction-free Markdown editor.

The current Free web plan documents 16 sounds, 1.5 hours of streaming per day, three playlists, five saved favorites, a simple timer, and a simple text editor. Pro expands those limits and tools. Exact prices can vary by billing choice, market, and platform, so use Noisli’s current pricing page before buying.

Noisli’s iOS and Android apps are the better fit when offline access matters. The web version is the better fit when its editor and work-session controls are central to your routine.

Key differences

Sound library and discovery

Slo documents 151 curated sounds. Noisli documents 28 sounds on Pro and 16 on its Free web plan. A larger number gives Slo more raw variety; Noisli’s smaller set is tied to playlists, saved combinations, oscillation, and shuffle.

Library size does not prove better recordings or better concentration. It only changes how much material you can combine.

Mixing workflow

Both products let you combine ambient sounds and adjust layers. Slo also exposes browser presets and individual sound pages, which makes it easy to test one sound or a prepared mix from an article. Noisli integrates mixing more tightly with its account, favorites, playlists, and focus tools.

Productivity tools

Noisli is the clear fit if you want a Markdown editor and a configurable work-session timer beside the soundscape. Its timer statistics can also summarize completed focus sessions.

Slo’s browser players include playback timers, but Slo does not position itself as a writing environment or Pomodoro tracker.

Platforms

Both products currently provide iOS and Android downloads. Slo also has a Mac download path; Noisli instead provides a browser app and Chrome extension. The right choice depends on whether you prefer a native Mac experience or a browser-centered workflow.

Access and pricing

Noisli publishes detailed Free, Pro, and Business web limits. Slo’s browser players and mixer can be used without an app download, but this article does not make claims about app prices, trials, or which sounds are included in paid plans. Check the current store listing relevant to your device.

Which should you choose?

Choose Slo when you primarily want ambient sound, enjoy building layered soundscapes, want more documented sound choices, or prefer a native Mac download. Start with the browser mixer to test that workflow.

Choose Noisli when you want sound combined with writing, timed work sessions, playlists, saved favorites, and a browser extension. Its current Android support also makes it a valid choice for Android users.

If neither approach fits, compare the broader shortlist in our Noisli alternatives guide or see the best focus sound apps.

Frequently asked questions

Is Noisli still available on Android?

Yes. Noisli’s official apps page currently lists Android and iOS. Claims that its Android app ended in 2023 are outdated and incorrect.

Is Slo or Noisli better for focus?

Slo is the more focused sound tool; Noisli combines sound with a timer, editor, playlists, and session statistics. Choose based on the workflow you will actually use, then compare it with silence on the same task.

Which has more sounds?

Slo documents 151 curated sounds. Noisli documents 28 on Pro and 16 on its Free web plan. Counts do not measure recording quality or cognitive benefit.

Can I use either product in a browser?

Yes, but the scope differs. Slo provides browser sound players, a mixer, and presets. Noisli provides a fuller browser workspace with accounts, editor, playlists, and focus-session tools.

Does either app guarantee better focus or sleep?

No. Ambient sound may mask distractions or support a routine, but results depend on the listener, task, room, and volume. Neither should be treated as a medical treatment.

Official sources checked July 31, 2026

• Noisli: features, apps, and plans and pricing.
• Slo: current website product ledger, browser players, mixer, presets, and platform download paths.

Related guides

• Best Noisli Alternatives in 2026
• Best Focus Sound Apps in 2026
• Best Sounds for Studying
• How to Use Sound Mixing

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