# PDF Reader vs Gyst AI

The clearest difference is iOS requirement: Gyst AI at 12.0 against PDF Reader's 18.1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. PDF Reader sells 1 one-off in-app purchase and Gyst AI sells 4 in-app purchases, starting at $9.00 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 5, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | PDF Reader | Gyst AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pdf-reader-text-to-speech/id6739147199/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 9 MB | 91 MB |
| Requires iOS | 18.1 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Morgan Zellers](https://appshunter.io/developer/1651985906) | [Divya Vikash](https://appshunter.io/developer/1820397692) |

## What reviewers say

### PDF Reader

[App page](https://appshunter.io/ios/app/pdf-reader-text-to-speech/id6739147199)

Transform PDF documents into natural-sounding audio. Listen to reports, academic papers, or any text while on the go, exercising, or multitasking. Enjoy customizable voices and a distraction-free interface to maximize your reading time.

**Highlights:** PDF to audio conversion, Local text-to-speech with natural voices, Customizable voice selection, Playback controls, English language with accent options, Distraction-free interface

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime | $4.99 | one-time |


### Gyst AI

[App page](https://appshunter.io/ios/app/gyst-ai/id6747496504)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $9.00 | per month |
| Premium Monthly | $19.00 | per month |
| Pro Yearly | $81.00 | per year |
| Premium Yearly | $170.99 | per year |


## Frequently asked questions

### Is PDF Reader free?

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

### Is Gyst AI free?

Gyst AI is free to download, with in-app purchases available.

### Do PDF Reader or Gyst AI have ads?

Neither PDF Reader nor Gyst AI shows ads.

### Which is updated more often, PDF Reader or Gyst AI?

PDF Reader ships an update every 3 weeks, and Gyst AI every 3 weeks. Most recently, PDF Reader was updated on October 5, 2026 and Gyst AI on October 14, 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.*