Amazing Slow Downer Alternative — Free
Same core workflow, no app store, no payment.
Amazing Slow Downer's strengths
Amazing Slow Downer has been the iOS and desktop favorite for years. Its interface is simple, its algorithm is reliable, and it handles the 'slow down without changing pitch' task cleanly. The free version offers limited functionality and the full version is paid. It's also a mobile-first app — great on iPad for couch practice, less convenient on a laptop workstation.
Where loope fits
loope lives in the browser, which means one URL works on every device: phone, tablet, laptop, desktop. No app store install, no separate license per device. If you practice on your laptop during the week and your tablet on weekends, you're using the same tool in the same tabs on both. Your practice workflow is consistent across form factors, which is surprisingly valuable once you've experienced it.
Open loope on any deviceCore features match
Slow-down with pitch preservation: both. Pitch shift / transpose: both. A/B looping: both. Waveform visualization: both. EQ: ASD yes, loope not yet. Mixer / karaoke vocal reduction: ASD yes, loope no. For the core 'slow, loop, transpose' workflow that most musicians need, loope covers the same ground. For the extras (EQ, vocal reduction), ASD has more features.
Mobile experience compared
On mobile, Amazing Slow Downer is a native app with smooth touch controls. loope is a web app; it works on mobile but is not yet as polished on small screens as a native app. If you primarily practice on your phone, ASD's native experience is currently better. If you primarily practice on desktop or switch between devices, loope's 'one tool everywhere' approach wins.
Try loope first — it's free
There's no risk to trying loope. No download, no signup, no trial limit. If it does what you need, you've saved the ASD purchase price. If it doesn't, you've lost nothing but a minute of exploration. Many users settle in with loope and never go back; some need ASD's extra features and stick with it. Either way, the zero-friction free trial makes the decision easy.
Try it now in Loope
Drop a track. Slow it down. Loop the tricky part. Change the key. All in your browser — no upload, no signup.
Open LoopeRelated Guides
Frequently Asked Questions
loope runs in any modern mobile browser (Safari on iOS, Chrome on Android). You can add it to your home screen for an app-like experience. Native apps are not required.
Not yet. Karaoke-style vocal reduction is on the roadmap but currently unavailable. If vocal reduction is essential, ASD or a dedicated stem splitter is a better fit today.
Processing happens on your device via WebAssembly, so the actual slow-down and pitch shift are offline. The initial page load requires internet.
loope uses Signalsmith Stretch, a modern phase-vocoder implementation. Audio quality at typical slow-down ranges is comparable to Amazing Slow Downer and other modern tools.
Yes. loope supports MP3, WAV, FLAC, OGG — the common formats you'll encounter. Drag and drop a file into the page to load it.