# Rayyan vs Prokrino

The clearest difference is update cadence: Prokrino at every 3 days against Rayyan's every 5 weeks. Rayyan's advantage is iOS requirement (15.1 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Rayyan sells 13 in-app purchases, starting at $9.99 per month and Prokrino sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Rayyan ships an update every 5 weeks, Prokrino every 3 days. The most recent releases landed on October 17, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Rayyan | Prokrino |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (23 ratings)](https://appshunter.io/ios/app/rayyan/id1581620841/reviews)** | — |
| Number of ratings | **23** | — |
| Positive reviews | 37.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 36 MB | 14 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 17+ | 4+ |
| Developer | [Rayyan Systems, Inc.](https://appshunter.io/developer/1581620843) | [Spyridon Tsiolakis](https://appshunter.io/developer/6798203255) |

## What reviewers say

### Rayyan

[App page](https://appshunter.io/ios/app/rayyan/id1581620841)

This app streamlines systematic literature reviews for researchers, enabling quick article screening and decision-making on mobile devices. It supports offline work and real-time collaboration, significantly reducing review time.

**Highlights:** Offline article screening, Real-time collaboration, Quick inclusion decisions, Reference labeling, Article filtering, Configurable settings

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

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Student Monthly | $9.99 | per month |
| Professional Monthly | $14.99 | per month |
| Student Quarterly | $24.99 | per 3 months |
| Essential Quarterly | $24.99 | per 3 months |
| Professional Quarterly | $39.99 | per 3 months |
| Advanced Quarterly | $39.99 | per 3 months |
| Student Annual | $59.99 | per year |
| Essential Annual | $59.99 | per year |
| Advanced Quarterly 2 Seats | $79.99 | per 3 months |
| Professional Annual | $99.99 | per year |
| Advanced Annual | $99.99 | per year |
| Advanced Quarterly 4 Seats | $159.99 | per 3 months |
| Advanced Annual 5 Seats | $499.99 | per year |


### Prokrino

[App page](https://appshunter.io/ios/app/prokrino/id6798203253)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Prokrino Pro | $9.99 | one-time |


## Frequently asked questions

### Is Rayyan free?

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

### Is Prokrino free?

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

### Do Rayyan or Prokrino have ads?

Neither Rayyan nor Prokrino shows ads.

### Which is updated more often, Rayyan or Prokrino?

Rayyan ships an update every 5 weeks, and Prokrino every 3 days. Most recently, Rayyan was updated on October 17, 2026 and Prokrino on October 2, 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.*