# Chat PDF Summary vs PDFai

The clearest difference is ads: Chat PDF Summary at none against PDFai's shown. PDFai's advantage is update cadence (fortnightly vs every 8 months) and device support (3 vs 1). On price and in-app purchases there is nothing between them.

Both are free to download. Chat PDF Summary sells 6 in-app purchases, starting at $5.99 per 7 days and PDFai sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Chat PDF Summary ships an update every 8 months, PDFai fortnightly. The most recent releases landed on November 5, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Chat PDF Summary | PDFai |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 months | **Fortnightly** |
| Size | 9 MB | 96 MB |
| Requires iOS | 17.0 | **15.5** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jose Sapon](https://appshunter.io/developer/1833571607) | [KolekciApps LLC](https://appshunter.io/developer/1873341851) |

## What reviewers say

### Chat PDF Summary

[App page](https://appshunter.io/ios/app/chat-pdf-summary-ai-summarize/id6758478401)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Weekly | $5.99 | per 7 days |
| Plus Yearly | $49.99 | per year |
| Premium Version | $2.99 | one-time |
| Small Credits Pack | $4.99 | one-time |
| Medium Credits Pack | $6.99 | one-time |
| Large Credits Pack | $8.99 | one-time |


### PDFai

[App page](https://appshunter.io/ios/app/pdfai-pdf-chat-and-summarizer/id6780204877)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Monthly | $12.99 | per month |
| Yearly | $99.99 | per year |


## Frequently asked questions

### Is Chat PDF Summary free?

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

### Is PDFai free?

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

### Do Chat PDF Summary or PDFai have ads?

PDFai shows ads; Chat PDF Summary does not.

### Which is updated more often, Chat PDF Summary or PDFai?

Chat PDF Summary ships an update every 8 months, and PDFai fortnightly. Most recently, Chat PDF Summary was updated on November 5, 2026 and PDFai on November 10, 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.*