# AI PDF Summarizer & Doc Chat vs ExplainThisDoc

The clearest difference is update cadence: ExplainThisDoc at every 3 days against AI PDF Summarizer & Doc Chat's every 6 weeks. AI PDF Summarizer & Doc Chat's advantage is iOS requirement (15 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. AI PDF Summarizer & Doc Chat sells 3 in-app purchases, starting at $6.49 per 7 days and ExplainThisDoc sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

AI PDF Summarizer & Doc Chat ships an update every 6 weeks, ExplainThisDoc every 3 days. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | AI PDF Summarizer & Doc Chat | ExplainThisDoc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/ai-pdf-summarizer-and-doc-chat/id6756771374/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 77 MB | 90 MB |
| Requires iOS | **15** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Nisha Sethiya](https://appshunter.io/developer/1841358619) | [Julian Heger](https://appshunter.io/developer/1874584074) |

## What reviewers say

### AI PDF Summarizer & Doc Chat

[App page](https://appshunter.io/ios/app/ai-pdf-summarizer-and-doc-chat/id6756771374)

Instantly summarize lengthy documents, extract key information, and ask questions about your files. This tool saves time for students, professionals, and researchers by providing quick insights from PDFs, Word docs, and text files.

**Highlights:** Summarize any PDF, Word doc, or text file, Extract key points from research papers, Ask questions about document content, Analyze contracts and legal files, Save time on document review

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $6.49 | per 7 days |
| Monthly | $8.99 | per month |
| Yearly | $24.99 | per year |


### ExplainThisDoc

[App page](https://appshunter.io/ios/app/explainthisdoc-pdf-and-archive/id6758720729)

**Features:** iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 5 Credits | $2.99 | one-time |
| 50 Credits | $24.99 | one-time |
| 200 Credits | $69.99 | one-time |


## Frequently asked questions

### Is AI PDF Summarizer & Doc Chat free?

AI PDF Summarizer & Doc Chat is free to download, with in-app purchases available.

### Is ExplainThisDoc free?

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

### Do AI PDF Summarizer & Doc Chat or ExplainThisDoc have ads?

Neither AI PDF Summarizer & Doc Chat nor ExplainThisDoc shows ads.

### Which is updated more often, AI PDF Summarizer & Doc Chat or ExplainThisDoc?

AI PDF Summarizer & Doc Chat ships an update every 6 weeks, and ExplainThisDoc every 3 days. Most recently, AI PDF Summarizer & Doc Chat was updated on October 24, 2026 and ExplainThisDoc on October 28, 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.*