# Bolletta Zero Card vs Reverse Audio

The clearest difference is in-app purchases: Bolletta Zero Card at none against Reverse Audio's 5. Reverse Audio's advantage is update cadence (every 9 days vs every 9 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Reverse Audio sells 5 in-app purchases, starting at $3.99 per 7 days. Bolletta Zero Card asks for nothing beyond the download.

Bolletta Zero Card ships an update every 9 months, Reverse Audio every 9 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | Bolletta Zero Card | Reverse Audio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (113 ratings)](https://appshunter.io/ios/app/reverse-audio-singback/id6751766912/reviews)** |
| Number of ratings | — | **113** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 9 days** |
| Monetization | — | Freemium |
| Size | 41 MB | 58 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Data Loyalty srl](https://appshunter.io/developer/1501367703) | [ilker beri](https://appshunter.io/developer/1772886549) |

## What reviewers say

### Bolletta Zero Card

[App page](https://appshunter.io/ios/app/bolletta-zero-card/id1476045243)

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

**In-app purchases:** none


### Reverse Audio

[App page](https://appshunter.io/ios/app/reverse-audio-singback/id6751766912)

This app lets you participate in the viral reverse singing challenge. Record yourself singing, reverse the audio to learn the gibberish, then record yourself singing the reversed version. Finally, reverse it again to see if it sounds like the original song.

**Highlights:** Instant audio reversing, High-quality recording, Simple, intuitive design, Easy sharing of recordings, Save all audio clips, Trim and edit audio (PRO)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscriptions | $3.99 | per 7 days |
| Reverse Singing Pro - Weekly | $4.99 | per 7 days |
| Weekly Subscription | $6.99 | per 7 days |
| Reverse Play Unlimited Annual | $29.99 | per year |
| Lifetime Subscription | $34.99 | one-time |


## Frequently asked questions

### Is Bolletta Zero Card free?

Bolletta Zero Card is free to download, with no in-app purchases.

### Is Reverse Audio free?

Reverse Audio is free to download, with in-app purchases available.

### Do Bolletta Zero Card or Reverse Audio have ads?

Neither Bolletta Zero Card nor Reverse Audio shows ads.

### Which is updated more often, Bolletta Zero Card or Reverse Audio?

Bolletta Zero Card ships an update every 9 months, and Reverse Audio every 9 days. Most recently, Bolletta Zero Card was updated on October 25, 2026 and Reverse Audio on October 25, 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.*