RepeatLab: Slow & Loop Music

Verena Zaiser

In-app purchases

About this app

Loop it. Slow it down. Nail it. 🎵

RepeatLab is the audio looper and speed trainer built for musicians. Loop any section of a song, slow down music without changing the pitch, and now loop videos too — the fastest way to master difficult riffs, solos and passages.

Trusted by musicians worldwide · 35,000+ downloads · No ads · No account · 100% offline

🔁 PRECISE A-B LOOPING
- Tap to mark the start and end of any tricky section and loop it instantly
- Fine-tune loop points to the millisecond on the interactive waveform
- Multiple named, color-coded loops per song (Pro), shown on a visual timeline
- Jump between loops from the lock screen, notification or Bluetooth controls

🐢 SLOW DOWN MUSIC WITHOUT CHANGING PITCH (Pro)
- Slow songs down to 0.5× or speed up to 2.0× in fine 0.1 steps
- Tempo changes, pitch stays true — no chipmunk effect
- Simple multiplier or exact BPM mode (up to 400 BPM)
- Tap Tempo: detect a song's BPM by tapping along

🎼 CHANGE THE KEY, NOT THE SPEED (Pro · NEW)
- Transpose any song up or down by up to 12 semitones
- Match your instrument's tuning or practice in a comfortable key
- Pitch is saved per song and combines freely with speed control

🎬 VIDEO LOOPING (NEW)
- Import video tutorials or live performances and loop them like audio
- Slow down videos to practice along, section by section
- Supports MP4, MOV, M4V, MKV, WEBM and AVI

📊 WAVEFORM WITH ZOOM
- See every beat: played vs. unplayed audio and all loop markers
- Drag to scrub precisely, zoom 0.25×–5× (Pro) to hit the exact note

🎧 BUILT FOR PRACTICE
- Unlimited songs — always free, batch import included
- MP3, WAV, OGG, FLAC, M4A and AAC support with editable tags
- Full background playback with lock-screen and headphone controls
- Export any loop as a lossless WAV file (44.1/48 kHz) — free
- Back up your whole library to a single local file (Pro)

🔒 PRIVATE BY DESIGN
- 100% offline — your files never leave your device
- No account, no registration, no ads
- Analytics strictly opt-in, GDPR compliant

🌍 IN YOUR LANGUAGE
Fully localized in 16 languages, with an in-app language switcher.

PERFECT FOR
Guitarists, bassists, drummers, pianists, singers, DJs and music students — transcribe solos, learn songs by ear, practice with a slowed-down backing track or drill that one bar until it sits.

FREE VS. PRO
Free forever: unlimited songs, 1 loop per song, WAV export, background playback, no ads.
Pro: unlimited loops, speed & BPM control, pitch control, waveform zoom, library backup — weekly, yearly (3-day free trial) or one-time lifetime purchase.

Built with its users: vote for features directly in the app. Download RepeatLab and transform your music practice today!

Ratings and reviews

Paid version might be cool, but it's hard to say. The free version disables zoom and speed change - both of which I need in order to learn parts.

Look, good app, a bit buggy though. one of the bugs was that after cutting out a loop, if you scroll around the music hand, the app shows that nothing changed but the music shifts, either forwards or backwards. don't know if it only for free or paid versions as well. I'll install it again if the bug is fixed. Let me know.

this feels close to being a really good music looping app but currently I can't see how to make it usable for a live performance situation as a backing track player that can break a song up into different sections that will repeat depending on whether or not the loop function is enabled, obviously in a seamless fashion. that is all.

What’s new

- Changing pitch is now possible
- Selecting multiple audio/video files is now possible
- Bug Fixes, Performance and Stability Improvements