# Reverse Singing Fun Challenge vs ConcertPrep

The clearest difference is in-app purchases: ConcertPrep at none against Reverse Singing Fun Challenge's 3. ConcertPrep also leads on ads (none vs shown). Reverse Singing Fun Challenge's advantage is device support (3 vs 1). On price, update cadence and iOS requirement there is nothing between them.

Both are free to download. Reverse Singing Fun Challenge sells 3 in-app purchases, starting at $3.49 per month. ConcertPrep asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 10, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Reverse Singing Fun Challenge | ConcertPrep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (55 ratings)](https://appshunter.io/ios/app/reverse-singing-fun-challenge/id6478737135/reviews)** | — |
| Number of ratings | **55** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 77 MB | 61 MB |
| Requires iOS | **15.6** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [NGUYEN QUY SON](https://appshunter.io/developer/1713872645) | [Adnan Reza](https://appshunter.io/developer/6792608311) |

## What reviewers say

### Reverse Singing Fun Challenge

[App page](https://appshunter.io/ios/app/reverse-singing-fun-challenge/id6478737135)

Easily reverse audio from live recordings or existing files, adjusting playback speed for unique sound effects. This app also offers a variety of voice filters to transform your voice into characters like robots or Santa Claus. Create funny and creative audio experiences with simple editing tools.

**Highlights:** Reverse audio instantly, Adjust playback speed, Variety of voice effects, Trim audio, Save audio in different formats, Live recording reversal

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $3.49 | per month |
| Weeky Subscription | $7.99 | per 7 days |
| 3-Day Free Trial | $76.99 | per year |


### ConcertPrep

[App page](https://appshunter.io/ios/app/concertprep/id6792608309)

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

**In-app purchases:** none


## Frequently asked questions

### Is Reverse Singing Fun Challenge free?

Reverse Singing Fun Challenge is free to download, with in-app purchases available.

### Is ConcertPrep free?

ConcertPrep is free to download, with no in-app purchases.

### Do Reverse Singing Fun Challenge or ConcertPrep have ads?

Reverse Singing Fun Challenge shows ads; ConcertPrep does not.

### Which is updated more often, Reverse Singing Fun Challenge or ConcertPrep?

Reverse Singing Fun Challenge ships an update every 3 weeks, and ConcertPrep every 3 weeks. Most recently, Reverse Singing Fun Challenge was updated on October 10, 2026 and ConcertPrep on October 8, 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.*