# Readefine vs Papyrus

The clearest difference is in-app purchases: Papyrus at none against Readefine's 1. Papyrus also leads on update cadence (weekly vs every 3 weeks). Readefine's advantage is iOS requirement (15.0 vs 17.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Readefine sells 1 in-app purchase, starting at $10.00 per month. Papyrus asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Readefine against 5.0 for Papyrus. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

Readefine ships an update every 3 weeks, Papyrus weekly. The most recent releases landed on October 12, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Readefine | Papyrus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/readefine/id1544832207/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/papyrus-research-library/id6766133716/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Freemium | **Free** |
| Size | 9 MB | 30 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Readefine LLC](https://appshunter.io/developer/1544832209) | [Zhenda Fu](https://appshunter.io/developer/1896207907) |

## What reviewers say

### Readefine

[App page](https://appshunter.io/ios/app/readefine/id1544832207)

This app rewrites web content to suit your needs, offering AI-powered summarization, translation, tone changes, and simplification. It also includes a hyper-speed dictionary and unit converter.

**Highlights:** AI-powered rewording, Summarize web content, Translate into multiple languages, Adjust text tone and complexity, Hyper-speed dictionary, Unit and currency conversion

**Features:** Safari Extension

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Readefine AI: Pro | $10.00 | per month |


### Papyrus

[App page](https://appshunter.io/ios/app/papyrus-research-library/id6766133716)

This native research workspace allows users to read, annotate, organize, and cite PDFs. It offers features for writing directly on pages with Apple Pencil, taking notes beside sources, and organizing research into themed notebooks. The app facilitates turning reading into writing by grouping papers for manuscripts and managing projects.

**Highlights:** Read and annotate PDFs, Write on pages with Apple Pencil, Take Markdown notes beside sources, Organize research into themed notebooks, Group papers for manuscript projects, Search full text and annotations, Import PDFs and BibTeX/RIS files

**Features:** Safari Extension, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Readefine free?

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

### Is Papyrus free?

Papyrus is free to download, with no in-app purchases.

### Which has better reviews, Readefine or Papyrus?

Readefine and Papyrus are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.

### Do Readefine or Papyrus have ads?

Neither Readefine nor Papyrus shows ads.

### Which is updated more often, Readefine or Papyrus?

Readefine ships an update every 3 weeks, and Papyrus weekly. Most recently, Readefine was updated on October 12, 2026 and Papyrus on October 31, 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.*