# ChatPDF AI vs Rennly

The clearest difference is ads: Rennly at none against ChatPDF AI's shown. ChatPDF AI's advantage is update cadence (every 3 days vs every 6 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. ChatPDF AI sells 4 in-app purchases, starting at $3.99 per 7 days and Rennly sells 3 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ChatPDF AI ships an update every 3 days, Rennly every 6 weeks. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ChatPDF AI | Rennly |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/chatpdf-ai-chat-and-pdf-summary/id6744906438/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 33 MB | 35 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Deploy Global OU](https://appshunter.io/developer/1783394589) | [Alina Berezhnyuk](https://appshunter.io/developer/1840890255) |

## What reviewers say

### ChatPDF AI

[App page](https://appshunter.io/ios/app/chatpdf-ai-chat-and-pdf-summary/id6744906438)

This AI-powered tool allows you to interact with your documents. Upload PDFs, DOCX, or TXT files and ask questions, get summaries, or receive help with homework. It transforms static files into searchable conversations for quick information retrieval.

**Highlights:** Chat with any document (PDF, DOCX, TXT, EPUB), Summarize pages or entire files, Homework help and essay writing assistance, Supports large files and multiple languages, Instant search for quick answers

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DocChatAI - PRO | $3.99 | per 7 days |
| Weekly Trial | $4.99 | per 7 days |
| DocChatAI - PRO | $9.99 | per month |
| DocChatAI - PRO | $39.99 | per year |


### Rennly

[App page](https://appshunter.io/ios/app/rennly-subscription-tracker/id6797437772)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| week | $6.99 | per 7 days |
| Year | $29.99 | per year |
| trial | $44.99 | per 7 days |


## Frequently asked questions

### Is ChatPDF AI free?

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

### Is Rennly free?

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

### Do ChatPDF AI or Rennly have ads?

ChatPDF AI shows ads; Rennly does not.

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

ChatPDF AI ships an update every 3 days, and Rennly every 6 weeks. Most recently, ChatPDF AI was updated on October 30, 2026 and Rennly on October 25, 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.*