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Tempo SlowMo - BPM Music Practice Slow Downer

By Martian Storm Ltd.

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Practice at your own pace.

Tempo SlowMo is an ideal practice tool for musicians, dancers and language students. Using technology developed for our Chord Detector and Chord Tutor apps, Tempo SlowMo’s sleek and simple design helps you practice playing songs, dance routines or learning a new language by slowing down or speeding up an audio tracks BPM (beats per minute) without affecting its pitch.

5 Stars “Great for playing guitar!”
5 Stars “Elegant and intuitive”
5 Stars “Great for transcribing songs on drums”
5 Stars “Amazing for memorization!”
5 Stars “Great for dance teachers”
5 Stars “Good for fitness too!”
5 Stars “Great for choir practice”
5 Stars “This app is my favorite :) i love it!!!”

Just hit the Music button within the app to reveal the available audio import options. Import an audio file from your iPod music library, Dropbox account or over WiFi network directly to your device. Tempo SlowMo will then load the audio file which you can then play, pause, slow down and speed up to your hearts content.

Tempo SlowMo also has a feature allowing you to drop markers at any point in the track so that you can quickly skip back to that point if there is a particular bit of a track you are trying to master. Special Loop Markers allow you to loop part of a track if you need to master a specific section. Start and End Track Markers allow you to override the point where a track begins and ends.

As well as being able to import audio files from different sources you can also make your own recording and save it for future use.

Export features are now provided as of version 1.3.0. You can export the changes you made to an audio file to MP4 and upload it to Dropbox or send it as an email attachment.

Please note that this app does not support tracks which are DRM protected.

List of core features:-

● Import tracks from iPod music library sync’d to device
● Support for iTunes Match
● Change tempo while playing between 20% and 250% or original tempo.
● Display BPM value if track is tagged with BPM via idv3 or iTunes metadata.
● Plays in background
● AirPlay support
● Play track on continuous loop
● loop sections of a track
● Export to Dropbox or Email (not supported on iPhone 3G)
● Input from devices microphone and slow down/speed up recording
● Import tracks from your Dropbox
● Import tracks from your computer over WiFi
● Import mp3 and m4a email attachments
● Gapless playback

List of additional features available via In-App Purchase:-

● Playlist – create, update, save and load playlists of tracks. BPM lock feature included which enables you to play an entire playlist at the same BPM.
● Pitch Changer – alter the pitch in 0.5 semitone increaments between -12 and +12 semitones.
● BPM Tapper – determine the BPM of your track.
● Equaliser Control – isolate specific frequency bands with this 10 band equaliser.
● Balance Control – change the volume per channel.
● Remove Adverts – The app is free but contains adverts. Use this option to remove the adverts.

If there are any features you would like to see in Tempo SlowMo please let us know.


What's New in Version 1.3.27

Fixed issue preventing looping function and playlist skipping onto next track.


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Customer Reviews

Nice but for one issue

The pitch adjustment is too course grain. The minimum change the tool supports is a 50 cent step size, which is half the distance between notes on the piano. Especially as a paid feature, this should be high resolution. It would be so much more useful if the pitch step size were 1 cent, just as the speed is. Improve this, and I will give this tool 5 stars.

I know Dropbox is supported, but I use Google Drive. I would love to see support for that.


I never write reviews, but this app is so fantastic. I’m a dance teacher, and I use it literally every day. The best feature, that I only discovered today, is the ability to import a song via Dropbox, change the tempo, and export the edited file, all on my iPhone without opening any editing software. Couldn’t be easier! This is not just the best free app I’ve ever downloaded, it might just be the best app, period.


This is what I was looking for. It allows you to import any song and play it back at a different speed. It allows looping of a specific section of a piece of music. As a budding violinist who needs to learn new pieces at a slower tempo, it lets me play along with music at a tempo manageable for me. This is one of the best apps I have. It would be great if this would interface with a bluetooth pedal such as the PageFlip Cicada; that would be icing on the cake!

Tempo SlowMo - BPM Music Practice Slow Downer
View in iTunes
This app is designed for both iPhone and iPad
  • Free
  • Category: Music
  • Updated:
  • Version: 1.3.27
  • Size: 5.8 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 5.1.1 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version:
All Versions:

Top In-App Purchases

  1. Pitch/Key Change$0.99
  2. BPM Tapper$0.99
  3. Playlist Festure$0.99
  4. Remove Advert$0.99
  5. Equaliser Feature$0.99
  6. Balance Control$0.99
  7. Remove Advert 2$2.99
  8. Remove Advert 3$4.99