# Rayyan vs TrendWatcher

The clearest difference is in-app purchases: TrendWatcher at none against Rayyan's 10. TrendWatcher also leads on update cadence (fortnightly vs every 5 weeks). Rayyan's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Rayyan sells 10 in-app purchases, starting at $9.99 per month. TrendWatcher asks for nothing beyond the download.

Rayyan ships an update every 5 weeks, TrendWatcher fortnightly. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Rayyan | TrendWatcher |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (25 ratings)](https://appshunter.io/ios/app/rayyan/id1581620841/reviews)** | — |
| Number of ratings | **25** | — |
| Positive reviews | 37.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 36 MB | 23 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +17 | 4+ |
| Developer | [Rayyan Systems, Inc.](https://appshunter.io/developer/1581620843) | [Lichen Zhu](https://appshunter.io/developer/1145043889) |

## 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 (10)**

| 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 |
| Professional Annual | $99.99 | per year |
| Advanced Annual | $99.99 | per year |


### TrendWatcher

[App page](https://appshunter.io/ios/app/trendwatcher-ai-app-ideas/id6789739135)

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

**In-app purchases:** none


## Frequently asked questions

### Is Rayyan free?

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

### Is TrendWatcher free?

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

### Do Rayyan or TrendWatcher have ads?

TrendWatcher shows ads; Rayyan does not.

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

Rayyan ships an update every 5 weeks, and TrendWatcher fortnightly. Most recently, Rayyan was updated on November 4, 2026 and TrendWatcher 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.*