Tools that work offline, on your own device — Works with Spotify

4 match your filters — 4 of them answered our check today.

Watching this group for 20 days · how we check

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Sonos Widget Plus

Live

An Android home-screen widget that controls Sonos speakers directly, with no app, login, cloud or subscription required - a one-time $1.99 purchase.

No sign-upWorks offlineNo subscriptionNo tracking
What to know▼
How it works
An Android home-screen widget that controls Sonos speakers directly over LAN — play/pause/skip, per-room volume, and up to 5 tappable favorites — without opening an app.
What's different
No login, analytics, subscription or cloud dependency; works with any Sonos speaker over the local network.
Pricing
$1.99 one-time purchase.
Best for
Android users with Sonos speakers who want quick control without launching the Sonos app.

Watched for 12 days · last checked 6d ago

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Bursting some Bubbles.

Live

Local-first overlay app for TikTok LIVE streamers with gift alerts, goals, leaderboards, and controller overlays that keep viewer data on the streamer's own PC.

FreeNo sign-upWorks offlineData stays with you
What to know▼
How it works
runs locally, browser-source URLs plug into OBS or TikTok LIVE Studio
What's different
no cloud, no agency funnel, no account needed
Pricing
free

Watched for 2 days · last checked 1d ago

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LufsMaster

Live

A free browser-based LUFS meter, stereo imager and EQ analyzer that processes audio locally with no upload or account, plus a preview mode simulating Spotify or YouTube playback. Built for musicians, not developers.

FreeNo sign-upNothing to installWorks offline
What to know▼
How it works
A browser-based audio mastering analyzer with real-time LUFS metering, stereo imaging, and EQ analysis with resonance detection, plus a preview mode that simulates how a track sounds on Spotify, YouTube, or Apple Music.
What's different
Processes audio 100% locally via the Web Audio API — no upload, account, or server involved.
Pricing
Free.
Best for
Musicians mastering tracks who want quick loudness and EQ checks without uploading audio anywhere.

Watched for 17 days · last checked 11d ago

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LUFS Mastering

Live

Automatically masters audio to Spotify's -14 LUFS loudness standard right in your browser, no upload or account needed — for musicians and producers self-releasing to streaming platforms.

No sign-upWorks offlineData stays with you
What to know▼
How it works
Drop a WAV, MP3 or FLAC file and it masters the audio to exactly -14 LUFS with -1 dBTP True Peak using deterministic DSP (ITU-R BS.1770-4), running entirely in the browser.
What's different
No server upload and no account required — processing happens 100% locally in the browser.
Best for
Musicians, producers and freelancers self-releasing tracks to Spotify, Apple Music, DistroKid, CD Baby, Tunecore or LANDR who want the loudness standard hit automatically.

Watched for 18 days · last checked 2d ago

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