# ChatPDF AI vs Reader AI

The clearest difference is iOS requirement: ChatPDF AI at 13.4 against Reader AI's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. ChatPDF AI sells 5 in-app purchases, starting at $2.99 per 7 days and Reader AI sells 8 in-app purchases, starting at $6.99 per 7 days. 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 September 1, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | ChatPDF AI | Reader AI |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Freemium | — |
| Size | 26 MB | 15 MB |
| Requires iOS | **13.4** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [YAHYA KEMAL SERT](https://appshunter.io/developer/1725191042) | [Thinking Systems LLC](https://appshunter.io/developer/1882858307) |

## What reviewers say

### ChatPDF AI

[App page](https://appshunter.io/ios/app/chatpdf-ai-scan-and-summarize/id6503151297)

This app uses AI to quickly summarize lengthy documents and articles. It allows users to scan physical documents and interact with PDFs by asking questions to extract key information, enhancing learning and productivity.

**Highlights:** AI-powered PDF summarization, Scan physical documents, Chat with document contents, Interactive learning experience, Support for various document types, Document management

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ChatPDF AI Weekly Premium | $2.99 | per 7 days |
| ChatPDF AI Annual Subscription | $39.99 | per year |
| ChatPDF AI Weekly Subscription | $3.99 | one-time |
| ChatPDF AI Lifetime Subsc | $49.99 | one-time |
| ChatPDF AI Annual Subsc. | $59.99 | one-time |


### Reader AI

[App page](https://appshunter.io/ios/app/reader-ai-markdown-reader/id6760142758)

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Reader AI Weekly Access | $6.99 | per 7 days |
| Reader AI Monthly Access | $14.99 | per month |
| Reader AI Yearly Access | $89.99 | per year |
| 100 Credits | $4.99 | one-time |
| 300 Credits | $7.99 | one-time |
| 750 Credits | $14.99 | one-time |
| 500 Credits | $19.99 | one-time |
| 2000 Credits | $59.99 | one-time |


## Frequently asked questions

### Is ChatPDF AI free?

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

### Is Reader AI free?

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

### Do ChatPDF AI or Reader AI have ads?

Neither ChatPDF AI nor Reader AI shows ads.

### Which is updated more often, ChatPDF AI or Reader AI?

ChatPDF AI ships an update every 3 weeks, and Reader AI every 3 weeks. Most recently, ChatPDF AI was updated on September 1, 2026 and Reader AI on September 15, 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.*