Amazing Slow Downer vs Rational Tonality
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Adjust playback speed (25%-200%)
- Change pitch without distortion
- Create seamless loops
- Support for Apple Music streaming
- Change tuning and musical key
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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.
Rational Tonality
This app provides reference tones for musicians playing continuous-pitch instruments. It helps achieve resonant ensemble intonation during solo practice sessions. Updates and tutorials are planned soon.
- Reference tones for practice
- Continuous-pitch instrument support
- Ensemble intonation training
- Solo practice aid
- Soft launch version
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Take the guesswork out of intonation! Musicians who play continuous-pitch instruments like strings, brass, winds, and voice can use Rational Tonality to achieve resonant ensemble intonation when practicing alone in the practice room. This version is the soft launch; look for tutorial information and updates soon.
Screenshots
Verdict
The clearest difference is price: Rational Tonality at $1.00 against Amazing Slow Downer's $14.99. Rational Tonality also leads on rating (5.0 vs 3.9) and update cadence (every 10 days vs every 2 months). Amazing Slow Downer's advantage is ratings volume (462 vs 7) and chart position (#22 vs unranked). On ads, in-app purchases, monetization model and device support 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
Amazing Slow Downer costs $14.99 and Rational Tonality $1.00 up front. Neither carries in-app purchases, so what you see is what you pay.
Rational Tonality holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Amazing Slow Downer has 462 ratings behind it against 7, so its average is the more settled of the two.
Amazing Slow Downer ships an update every 2 months, Rational Tonality every 10 days. The most recent releases landed on November 10, 2026 and November 3, 2026 respectively.
| Parameter | Amazing Slow Downer | Rational Tonality |
|---|---|---|
| Price | $14.99 | $1.00 — better |
| Rating | 3.9 (462 ratings) | 5.0 (7 ratings) — better |
| Positive reviews | 68.6% of reviews | — |
| Number of ratings | 462 — better | 7 |
| Update frequency | Every 2 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #22 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 13.4 — better |
| Further details — not scored | ||
| Size | 6 MB | 41 MB |
| Age rating | +4 | 4+ |
| Developer | Roni Music | Scott Dixon |
Customer experience
Amazing Slow Downer
Rational Tonality
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
Rational Tonality
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Amazing Slow Downer
No in-app purchases
Rational Tonality
No in-app purchases
Questions
Is Amazing Slow Downer free?
Is Rational Tonality free?
Which has better reviews, Amazing Slow Downer or Rational Tonality?
Do Amazing Slow Downer or Rational Tonality have ads?
Which is updated more often, Amazing Slow Downer or Rational Tonality?
Other comparisons
