Tempo SlowMo - BPM Slow Downer 4+

BPM Music Practice Slow Downer

Martian Storm Ltd.

Designed for iPad

    • 2.8 • 154 Ratings
    • Free
    • Offers In-App Purchases



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/Apple 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.

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.

Apple Music tracks in your music library can now be loaded and played in Tempo SlowMo. Unfortunately controls such as pitch, balance and equaliser cannot be used with Apple Music tracks. However you can change the tempo and set loops to your hearts content.

List of core features:-

● Import tracks from iPod/Apple Music library sync’d to device
● 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
● 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

Version 1.5.4

Squashed a couple more bugs:

- Fixed crash for some users when opening the iPod/Apple Music media picker.

Ratings and Reviews

2.8 out of 5
154 Ratings

154 Ratings

Is it fixable? ,

What Happened?

I have had this app for years and LOVE it. I use it all the time to slow down my music when I’m teaching color guard. Tonight my app for the first time wouldn’t allow me to access my library. It said I had to have an Apple Music subscription. I thought that was weird but was like fine...I love the app so why not. Well it still doesn’t work. My library pops up real quick and goes away. Is this fixable? I’d love to change my rating back to 5 stars which is what I would have given had I not encountered this issue.

Mac100 ,

Great app!

I got this app to play an entire playlist at a slower speed (eg 85%). While it doesn't do that exactly, it does BETTER! You can select the playlist (if you purchase that feature) and set the speed for each individual song - so you can have some songs slow, slower, and other songs faster (individually from 20%-250% speed). And it remembers your settings for each song! Plus you can change the speed on the fly by turning the dial. It plays in the background (yay!) and you can even set markers to loop. It remembers the last song you were on too when you reopen the app. And even MORE app awesomeness, it works on my old device too that hasn't been updated in years. Awesome, great job! As far as suggestions, 1-it's a little too easy to swipe to the right when turning the dial, 2-it would be nice to have a confirmation message when deleting markers (to avoid mistakes), 3-I wish there were theme colors. Thank you for the great app! I am so happy with this purchase!

Surface-Warrior ,


The developers allowed Apple to corrupt the app by requiring an Apple Music subscription to access your own music. I have songs that I wrote and recorded. I cannot even access them. Additionally, they changed it so that we cannot use the "Tap BPM" feature without having a song loaded, which (of course) requires an Apple Music subscription. I PURCHASED features in the app that I can no longer use due to the changes. Subsequently, I deleted the app from my device. I will never buy another app from these developers, ever again, because they cannot be trusted to not sell out to big tech and render our purchases null and void. They, essentially, stole my money as I purchased features and now I'm not allowed to access said features.

App Privacy

The developer, Martian Storm Ltd., 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 Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Identifiers

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Identifiers
  • Usage Data
  • Diagnostics

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

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