# Researchist vs ChatPDF

The clearest difference is iOS requirement: ChatPDF at 15.6 against Researchist's 27.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Researchist sells 1 in-app purchase, starting at $39.99 per year and ChatPDF sells 2 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Researchist | ChatPDF |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Size | 113 MB | 47 MB |
| Requires iOS | 27.0 | **15.6** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Essayist Software Inc.](https://appshunter.io/developer/1537845386) | [Ikhwan Noorsetyo](https://appshunter.io/developer/1739847271) |

## What reviewers say

### Researchist

[App page](https://appshunter.io/ios/app/researchist-pdf-reader/id6749282472)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Researchist Pro (Yearly) | $39.99 | per year |


### ChatPDF

[App page](https://appshunter.io/ios/app/chatpdf-ai-document-assistant/id6758316696)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $0.99 | per 7 days |
| Yearly Subscription | $34.99 | per year |


## Frequently asked questions

### Is Researchist free?

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

### Is ChatPDF free?

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

### Do Researchist or ChatPDF have ads?

Neither Researchist nor ChatPDF shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*