If you're a musician who likes to learn new songs and techniques by listening to the same piece of music over and over but wish that the music could be played a little slower, then you'll enjoy Amazing Slow Downer Lite.

You can repeat any section of the music at full speed, slow it down or even speed it up by changing the speed between 25% (1/4 of original speed) and 200% (double speed) without changing the pitch!

Change the tuning or musical key? No problem, Amazing Slow Downer Lite handles that as well.

Setup seamless loops by touching the "Set" buttons during playback.

Amazing Slow Downer Lite is the ideal tool for any musician, transcriber or dancer wanting to improve their skills.

Supports playback of streaming "Apple Music" audio!

Some functions such as "Pitch change" and "Equalizer" are not available when playing "Apple Music" songs.
"Apple Music" requires iOS 10.3 or better.

Important notes:
This free "Lite" version is restricted to play the first quarter of an audio file.

What’s New

Version 6.6.2

New - Recently played "Apple Music" songs are now synched between devices using iCloud
New - Better support for "Split View" and "Slide Over" on iPad
Change - Removed a limitation that could make it impossible to import certain files with very long file names
Bug fix - App could deadlock when loading a corrupt .m4a file

Ratings and Reviews

2.7 out of 5
65 Ratings

65 Ratings

OneEyedCat ,

Very unprofessional customer service

I have loved this app for years. Have actually recommended it to many people, but want other people to know that there may a security flaw, which the VERY unprofessional customer service rep tried to tell me was user error.

Last night, someone accessed my phone, using this app to play the last song I was listening to. They edited the song, and even named a loop, misspelling the word “experiment.” I thought it would be good to let the company know, but according to them, their app cannot be hacked. Maybe they should let the government use their spectacular coding skills, because even the Pentagon gets hacked. Yes, I am not using the latest iOS, as I’ve been advised to avoid it until Apple gets it right. That said, I’m fairly sure ASD was the point of entry.

This a their exact response, lack of proper capitalization, formatting, and all:

“forget that

it's not possible to hack your phone using ASD

whatever happened is either a bug in iOS 12
or just some user error

I would guess the later”

Developer Response ,

If you believe that someone hacked your phone, please report that to Apple. It's impossible to hack your device using Amazing Slow Downer. If it was possible, then every iOS app has a security flaw. I simply don't think that is true.

My Mark Anthony ,

A great app for what I need

This is a great application for what I need. I'm a professional solo musician and backing tracks are a big part of my show. Being able to import audio files to edit the time the tempo and the key ,and then export them to my applications on my tablet where I can play them live during my show . It works perfectly for me even with key changes five or six steps above or below for that reason I give it five stars. I also use AudioStretch which is a similar application but I like this one better . Want to thank Ronimusic for this application and another very useful application that I use a lot Sweet MIDI

JazzCat999 ,

Should I have just bought the full app in the App Store?

I upgraded from the lite version to the full version in the app. It worked fine. However, the app i have is still called ASD Lite. Plus the App Store says i have not purchased the full version and still wants me to pay 15$ to get it. Should i have just bought it from the App Store? If so, why do you even offer an in app upgrade if the full app is in the App Store?

Developer Response ,

The app icon or text can't be changed for any app but the app is now converted into the full version.

App Privacy

The developer, Roni Music, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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