# PDF Reader vs Mp3 Audio Converter

The clearest difference is in-app purchases: PDF Reader at none against Mp3 Audio Converter's 2. Mp3 Audio Converter's advantage is update cadence (every 6 days vs every 114 months) and iOS requirement (11.0 vs 14.0). On price, ads and device support there is nothing between them.

Both are free to download. Mp3 Audio Converter sells 2 one-off in-app purchases. PDF Reader asks for nothing beyond the download.

PDF Reader ships an update every 114 months, Mp3 Audio Converter every 6 days. The most recent releases landed on May 17, 2026 and August 29, 2026 respectively.

## The numbers

| Metric | PDF Reader | Mp3 Audio Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/mp3-audio-converter-recorder/id1510751133/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 114 months | **Every 6 days** |
| Monetization | — | Free with in-app purchases |
| Size | 10 MB | 20 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ramalingam Sivaramakrishnan](https://appshunter.io/developer/892706271) | [佳俊 顾](https://appshunter.io/developer/723276801) |

## What reviewers say

### PDF Reader

[App page](https://appshunter.io/ios/app/pdf-reader/id1084685959)

**Features:** macOS Compatibility

**In-app purchases:** none


### Mp3 Audio Converter

[App page](https://appshunter.io/ios/app/mp3-audio-converter-recorder/id1510751133)

Record unlimited audio and convert it to MP3 format. Transcribe spoken words into text for easy sharing and storage. Features a clean, user-friendly interface.

**Highlights:** Unlimited audio recording, Convert audio to MP3, Convert audio to text, Save audio locally, Share MP3 files, Clean interface

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| encourage developer | $0.99 | one-time |
| Remove AD | $0.99 | one-time |


## Frequently asked questions

### Is PDF Reader free?

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

### Is Mp3 Audio Converter free?

Mp3 Audio Converter is free to download, with in-app purchases available.

### Do PDF Reader or Mp3 Audio Converter have ads?

Both PDF Reader and Mp3 Audio Converter show ads.

### Which is updated more often, PDF Reader or Mp3 Audio Converter?

PDF Reader ships an update every 114 months, and Mp3 Audio Converter every 6 days. Most recently, PDF Reader was updated on May 17, 2026 and Mp3 Audio Converter on August 29, 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.*