# AudioStretch vs Robo Flute

The clearest difference is price: Robo Flute at Free against AudioStretch's $9.99. AudioStretch's advantage is rating (4.4 vs 3.8) and review sentiment (89% vs 50%). On device support there is nothing between them.

Robo Flute is free to download; AudioStretch costs $9.99 up front. Robo Flute sells 1 one-off in-app purchase. AudioStretch asks for nothing beyond the download.

AudioStretch holds the better App Store score, 4.4 against 3.8. That said, the two scores are not equally well evidenced: AudioStretch has 223 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 89% of AudioStretch's written reviews are positive against 50% of Robo Flute's.

AudioStretch ships an update every 3 months, Robo Flute every 11 months. The most recent releases landed on September 24, 2026 and August 27, 2026 respectively.

## The numbers

| Metric | AudioStretch | Robo Flute |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.4 (223 ratings)](https://appshunter.io/ios/app/audiostretch/id571863178/reviews)** | [3.8 (8 ratings)](https://appshunter.io/ios/app/robo-flute/id1439056853/reviews) |
| Number of ratings | **223** | 8 |
| Positive reviews | **88.7% of reviews** | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 11 months |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#59** | — |
| Size | 18 MB | 20 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cognosonic Pte Ltd](https://appshunter.io/developer/571863181) | [Bita Sobhani](https://appshunter.io/developer/1372721132) |

## What reviewers say

### AudioStretch

[App page](https://appshunter.io/ios/app/audiostretch/id571863178)

**Currently charting:** #59 Top Paid · Music (US App Store)

This tool allows musicians to slow down, loop, and transpose music from audio or video files. It's designed to help users learn songs by ear, experiment with sounds, or simply explore their music library in new ways.

**Highlights:** Import audio or video files, Capture video with phone camera, Change speed without changing pitch, Transpose any music, Loop difficult sections, LiveScrub waveform listening, Keyboard/spectrum transcription aid

**Features:** Vision Pro support

**In-app purchases:** none


### Robo Flute

[App page](https://appshunter.io/ios/app/robo-flute/id1439056853)

Compose music by inputting notes, fingering, and timing. Hear your compositions played on various real flutes. Convert fingerings between different flute types and improve skills with exercises.

**Highlights:** Compose music with note input, Hear compositions on various flutes, Convert fingering between flutes, Includes scales and exercises, Virtual instrument playback, Save, print, and export music (premium)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $7.99 | one-time |


## Frequently asked questions

### Is AudioStretch free?

AudioStretch costs $9.99, with no in-app purchases.

### Is Robo Flute free?

Robo Flute is free to download, with in-app purchases available.

### Which has better reviews, AudioStretch or Robo Flute?

AudioStretch is rated higher. AudioStretch averages 4.4 out of 5 from 223 ratings, while Robo Flute averages 3.8 from 8 ratings.

### Do AudioStretch or Robo Flute have ads?

Robo Flute shows ads; AudioStretch does not.

### Which is updated more often, AudioStretch or Robo Flute?

AudioStretch ships an update every 3 months, and Robo Flute every 11 months. Most recently, AudioStretch was updated on September 24, 2026 and Robo Flute on August 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*