Comparison

Amazing Slow Downer vs PolyTune

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Amazing Slow Downer

Learn songs and techniques by slowing down music without altering pitch. Adjust playback speed, change tuning, and create seamless loops. Ideal for musicians, transcribers, and dancers.

Highlights
  • Adjust playback speed (25%-200%)
  • Change pitch without distortion
  • Create seamless loops
  • Support for Apple Music streaming
  • Change tuning and musical key
Features
Currently charting
Read full description

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. 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 handles that as well. Setup seamless loops by touching the "Set" buttons during playback. Amazing Slow Downer is the ideal tool for any musician, transcriber or dancer wanting to improve their skills. New - Support for streaming "Apple Music" audio! Note: Some functions such as "Pitch change" and "Equalizer" are not available when playing "Apple Music" songs. Please note: According to Spotify, third party apps will not any longer have access to streaming Spotify content in a way that works for slowing down / pitch change audio starting September 1, 2022. This will affect Amazing Slow Downer. This means that you should NOT buy Amazing Slow Downer if playing Spotify content is your only use of the app. This change does NOT affect any other type of audio content that Amazing Slow Downer can play back.

About

PolyTune

This application provides a powerful and accurate tuning tool for musicians. It allows for simultaneous tuning of all strings, supports various guitar and bass modes, and offers drop tunings. Its technology is based on a highly-regarded pedal tuner used by professionals.

Highlights
  • Tune all strings at once
  • Guitar/bass mode
  • Drop tunings support
  • Award-winning pedal technology
  • Chromatic tuning modes
  • High accuracy
Features
Read full description

It's the most powerful tool you've ever had in your pants! You know ... for tuning. That said, this is one of those nuggets on the App store you cannot afford to miss if you value being in tune and you take your smartphone with you when you go places. Yes to both? Then it's a no-brainer! - Tune all strings at once! Just strum your guitar, and see the pitch of all strings instantly. - Guitar/bass mode - Drop-tunings - 1:1 port of the award-winning PolyTune pedal (Guitar Player, Guitar World, Premier Guitar, MIPA, NAMM Best in Show 2010, etc.) - Based one the world’s best selling pedal tuner used by countless pros such as Steve Vai, John Petrucci, Steve Morse, Orianthi and many more! PolyTune is the world's first polyphonic tuner that will have future guitarists wondering how we ever got by without it. The magic lies in a never before seen approach to tuning aimed at speed, accuracy and ease of use, which allows you to get in tune fast, and back to doing what you love: playing. The PolyTune iPhone app is a 1:1 port of the award-winning PolyTune pedal tuner, and PolyTune for iPhone delivers exactly the same features and tuning technology as the pedal version. The pedal version is the fastest way to tune on-stage, whereas the iPhone app is the fastest and most convenient way to tune off-stage. Specifications: - Reference pitch from 435Hz to 445Hz - Drop tuning from E-flat to B - 0.5 cent accuracy - 2 chromatic tuning modes: Needle and Stream - MonoPoly recognizes whether one or several strings are played at once

Screenshots

Amazing Slow Downer4 screens
PolyTune4 screens

Verdict

The call

The clearest difference is price: PolyTune at $4.99 against Amazing Slow Downer's $14.99. PolyTune also leads on iOS requirement (9.0 vs 16.0). Amazing Slow Downer's advantage is rating (3.9 vs 2.8) and update cadence (every 2 months vs every 40 months). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Amazing Slow Downer costs $14.99 and PolyTune $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Amazing Slow Downer holds the better App Store score, 3.9 against 2.8. That said, the two scores are not equally well evidenced: Amazing Slow Downer has 461 ratings behind it against 80, so its average is the more settled of the two. Written reviews point the same way: 69% of Amazing Slow Downer's written reviews are positive against 66% of PolyTune's.

UpkeepUpdate frequency

Amazing Slow Downer ships an update every 2 months, PolyTune every 40 months. Both last shipped on November 6, 2026.

Scorecard6 real differences · 5 level
Amazing Slow Downer versus PolyTune: the parameters behind the verdict, then further details
ParameterAmazing Slow DownerPolyTune
Price$14.99$4.99 — better
Rating3.9 (461 ratings) — better2.8 (80 ratings)
Positive reviews68.6% of reviews — better65.7% of reviews
Number of ratings461 — better80
Update frequencyEvery 2 months — betterEvery 40 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank#27 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.09.0 — better
Further details — not scored
Size6 MB45 MB
Age rating+44+
DeveloperRoni MusicTC Electronic

Customer experience

Amazing Slow Downer

All ratings460 ratings
Positive71.7%
Neutral7.4%
Negative20.9%
Written reviews366 reviews
Positive68.6%
Neutral7.9%
Negative23.5%

PolyTune

All ratings79 ratings
Positive41.8%
Neutral6.3%
Negative51.9%
Written reviews513 reviews
Positive65.7%
Neutral9.6%
Negative24.8%

User reviews

Amazing Slow Downer

From 461 App Store ratings

What we love

  • 🚀 Excellent for learning songs
  • 👍 Great for transcribing and practicing
  • 🎶 Allows slowing down and looping songs
  • 💡 Useful for language learning
  • 👍 Intuitive and easy to use

Room to improve

  • 🐛 Occasional bugs and crashes
  • 🔌 Compatibility issues with Apple Music
  • 💰 Considered expensive by some
  • 🔍 Difficulty setting precise loop points
  • 🔇 No volume control independent of device

PolyTune

From 80 App Store ratings

What we love

  • 🩵 Works really well
  • 💯 Accurate and precise
  • 🔢 Polyphonic tuning mode
  • 🎨 Customizable display colors
  • 🔌 Works with electric and acoustic guitars

Room to improve

  • 🐛 Crashes or freezes on newer iOS versions
  • 🔇 Struggles to pick up low strings or in noisy environments
  • ⏱️ Screen dims during use
  • 🚫 No support for alternate/custom tunings
  • 💤 Drains battery quickly when running in background

Bugs and requests

Amazing Slow Downer

Reported bugs

3 issues
  • Playback freezing or not working as expected
  • Inability to access purchased songs from iTunes library
  • Connectivity issues when trying to use with Spotify

Requested features

5 requests
  • Add ability to record and import voice memos
  • Improve library management and organization
  • Implement Audiobus support for looping in other apps
  • Add more precise speed and pitch adjustment controls
  • Provide option to display waveform for better visualization

PolyTune

Reported bugs

3 issues
  • Crashes on launch
  • Unable to detect or tune certain strings
  • Inaccurate tuning readings

Requested features

4 requests
  • Add support for 432Hz tuning
  • Implement custom tuning options
  • Improve compatibility with external audio interfaces
  • Add a dedicated on/off switch

In-app purchases

None

Amazing Slow Downer

No in-app purchases

None

PolyTune

No in-app purchases

Questions

Is Amazing Slow Downer free?
Amazing Slow Downer costs $14.99, with no in-app purchases.
Is PolyTune free?
PolyTune costs $4.99, with no in-app purchases.
Which has better reviews, Amazing Slow Downer or PolyTune?
Amazing Slow Downer is rated higher. Amazing Slow Downer averages 3.9 out of 5 from 461 ratings, while PolyTune averages 2.8 from 80 ratings.
Do Amazing Slow Downer or PolyTune have ads?
Neither Amazing Slow Downer nor PolyTune shows ads.
Which is updated more often, Amazing Slow Downer or PolyTune?
Amazing Slow Downer ships an update every 2 months, and PolyTune every 40 months. Most recently, Amazing Slow Downer was updated on November 6, 2026 and PolyTune on November 6, 2026.

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