Cycling through all six. Tap any point to stop.

Measured on six things

Riffloop turns any YouTube song into a practice studio: split it into stems, loop the hard bars, slow it down and change key, right under the video.

Growth

Domain registered June 2026, so roughly two months old. Zero reviews, community signals, or traction metrics found.

Screenshots

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Riffloop

About this app

Riffloop is an all-in-one music practice studio that runs right under the YouTube video you are already watching. AI stem separation splits any song into six parts: vocals, drums, bass, guitar, piano and more. Solo the guitar to learn a riff note for note, or mute the vocal and sing it yourself. Drag a region over the bar that trips you up and loop it, snapped to the beat, until it sticks. Pull the tempo down to 25% to catch every note with the pitch held steady, then walk it back up to full speed. Shift the whole track up or down by as much as 12 semitones to fit your voice or instrument. It works on your own files too. Upload an MP3, WAV or FLAC to the web Studio and get the same stems, loops, speed and key controls. Most tools give you half of this. A stem splitter hands you files and walks away. A looper forgets the stems. Riffloop keeps all of it in one place, on the song you are already learning. Free to start, no signup needed to try it.

Key features

1AI stem separation into 6 parts (vocals, drums, bass, guitar, piano, other) directly on YouTube or uploaded files
2A-B beat-snapped looping, pitch-preserving speed from 25% to 2x, and ±12 semitone key shift
3On-device processing with no upload required for YouTube videos; free tier available with no signup

Target customer profile

Drawn from the product itself, not from a survey.

Scout Review

Written by AI from measured evidence, scored out of 100.

Riffloop delivers a genuinely useful all-in-one practice studio that sits directly under YouTube videos, combining six-stem separation, A-B looping, pitch-preserving speed changes, and key transposition in one on-device experience. The product is polished enough to feel premium while remaining free to try. Its main limitations are mobile performance, minimal security headers, and the complete absence of third-party validation after only two months live.

Measure by measure

Usability

No signup friction, works instantly on YouTube, and surfaces stem, loop, speed, and key controls clearly. Free tier is genuinely usable without configuration.

Design

Polished dark theme with purposeful purple/blue accents and color-coded instrument tags that map directly to the waveform UI. Embedded hero demo provides immediate proof of the core workflow.

Speed

Desktop Lighthouse 96/100 is excellent. Mobile scores 66/100 with LCP at 6.2s, which drags real-world feel on slower connections.

Security

HTTPS is enforced and DMARC exists. Only 3 of 12 security headers present; no SOC 2, ISO, or public audits mentioned anywhere.

Accessibility

Lighthouse 96/100 with only one contrast failure. Dark theme and high-contrast tags help, but no a11y statement or keyboard details published.

Growth

Domain registered June 2026, so roughly two months old. Zero reviews, community signals, or traction metrics found.

Improvement areas

Mobile performance (LCP 6.2s) needs optimization for acceptable first-interaction speed
Security headers and public compliance documentation are minimal
Zero external reviews or community signals after two months live

Design & Usability

Riffloop's design nails the music-tool aesthetic with a near-black panel, neon purple/blue outlines, and instrument tags in distinct colors that match the waveform. The embedded hero demo immediately shows the YouTube player plus the actual interface with A/B loop markers and speed pills. Usability wins big on zero-friction entry: open any YouTube video, split stems, loop, transpose, and slow down without signing up or uploading. The free tier is genuinely free and runs on-device. Minor friction comes from the tiny hero product card making some labels hard to read and repeated identical CTAs that don't differentiate primary from secondary actions.

Speed & Security

Speed is split: desktop Lighthouse hits 96/100 while mobile lands at 66/100 with a 6.2-second LCP, so the first interaction on phones feels sluggish. Security is table-stakes only: HTTPS and DMARC are present, but the site carries just 3 of 12 recommended headers and publishes no SOC 2, ISO, or audit results. For a brand-new music tool that processes audio locally this is acceptable, yet the lack of transparency keeps the score in the low 40s.

Accessibility & Growth

Accessibility scores well at 80 thanks to a 96/100 Lighthouse result and only one contrast failure. The dark theme and high-contrast instrument tags support readability, though no public a11y statement or keyboard navigation details appear. Growth is the weakest dimension at 32 because the domain is only two months old with no reviews, community, or external traction signals yet. Early indie products often start this way; trajectory matters more than absolute numbers right now.

Conclusion

For guitarists, singers, and producers who already live inside YouTube tabs, Riffloop removes the usual friction of exporting, uploading, and switching apps. It is early, but the core loop of isolate-loop-slow-transpose works exactly as advertised and runs where the music already lives.

Suggestions for improvement

Add a visible security or compliance page even if it just lists the current headers and local-processing promise.
Increase hero demo card size or add a second larger screenshot so waveform labels stay legible.
Publish a short changelog or roadmap to give early users something to follow while the product grows.

How we score

Alternatives comparison

Named competitors, point by point. Nobody paid to appear here or to be left out.

	Riffloop
AI stem separation (6 stems) on YouTube	Yes - 6 stems directly on YouTube video	Varies by category
A-B looping + speed + key change	Yes - beat-snapped loop, 25% speed, ±12 semitones	Varies by category
Works on own uploaded files	Yes - MP3/WAV/FLAC support in web Studio	Varies by category
No signup required to try	Yes - free tier, no signup	Varies by category