# 100ZG vs PDF to Audio

The clearest difference is rating: 100ZG at 5.0 against PDF to Audio's 4.0. 100ZG also leads on review sentiment (15% vs 0%). PDF to Audio's advantage is ratings volume (16 vs 3). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. 100ZG sells 4 in-app purchases, starting at $2.99 per 7 days and PDF to Audio sells 1 in-app purchase, starting at $4.99 per year. Whichever you choose, the download price is not the number that matters.

100ZG holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: PDF to Audio has 16 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 15% of 100ZG's written reviews are positive against 0% of PDF to Audio's.

100ZG ships an update every 3 weeks, PDF to Audio monthly. Both last shipped on November 3, 2026.

## The numbers

| Metric | 100ZG | PDF to Audio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/100zg-format-conversion/id1594498120/reviews)** | [4.0 (16 ratings)](https://appshunter.io/ios/app/pdf-to-audio-pdf-converter/id6456017600/reviews) |
| Number of ratings | 3 | **16** |
| Positive reviews | **15.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 131 MB | 123 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NetPocket Co., Ltd.](https://appshunter.io/developer/1594498122) | [Rajaram Bhaskaran](https://appshunter.io/developer/1689435728) |

## What reviewers say

### 100ZG

[App page](https://appshunter.io/ios/app/100zg-format-conversion/id1594498120)

This app converts various file types including video, audio, images, and documents. It also offers file management, compression/decompression, and a built-in media player. A VIP subscription unlocks full functionality.

**Highlights:** Video, audio, image, and document format conversion, File management and organization, ZIP and 7z compression/decompression, Preview for images, GIFs, and documents, Built-in video and audio player with playback controls

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly membership | $2.99 | per 7 days |
| Monthly membership | $4.99 | per month |
| Annual membership | $19.99 | per year |
| PPT conversion recharge card | $1.99 | one-time |


### PDF to Audio

[App page](https://appshunter.io/ios/app/pdf-to-audio-pdf-converter/id6456017600)

Convert your PDF documents into natural-sounding audio files using advanced AI technology. Enjoy limitless conversions across 33 languages with a user-friendly interface, making information consumption effortless.

**Highlights:** AI-powered audio conversion, Natural-sounding voice output, Support for 33 languages, Unlimited PDF conversions, User-friendly interface, Convert documents, books, and more

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Premium - Annual | $4.99 | per year |


## Frequently asked questions

### Is 100ZG free?

100ZG is free to download, with in-app purchases available.

### Is PDF to Audio free?

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

### Which has better reviews, 100ZG or PDF to Audio?

100ZG is rated higher. 100ZG averages 5.0 out of 5 from 3 ratings, while PDF to Audio averages 4.0 from 16 ratings.

### Do 100ZG or PDF to Audio have ads?

Both 100ZG and PDF to Audio show ads.

### Which is updated more often, 100ZG or PDF to Audio?

100ZG ships an update every 3 weeks, and PDF to Audio monthly. Most recently, 100ZG was updated on November 3, 2026 and PDF to Audio on November 3, 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.*