# Bookends vs Moonlight

The clearest difference is in-app purchases: Moonlight at none against Bookends's 2. Moonlight also leads on update cadence (every 10 days vs every 2 months) and iOS requirement (15.1 vs 17.6). Bookends's advantage is review sentiment (76% vs 64%). On price, ads and device support there is nothing between them.

Both are free to download. Bookends sells 2 in-app purchases, starting at $14.99 per year. Moonlight asks for nothing beyond the download.

Bookends ships an update every 2 months, Moonlight every 10 days. The most recent releases landed on August 28, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Bookends | Moonlight |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (394 ratings)](https://appshunter.io/ios/app/bookends/id739087947/reviews)** | — |
| Number of ratings | **394** | — |
| Positive reviews | **76.4% of reviews** | 64.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 111 MB | 66 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sonny Software, LLC](https://appshunter.io/developer/417583547) | [Corca, Inc.](https://appshunter.io/developer/1711708611) |

## What reviewers say

### Bookends

[App page](https://appshunter.io/ios/app/bookends/id739087947)

Manage your research references and PDFs on your mobile device. Search online databases, import metadata, annotate PDFs, and organize your library. Offers basic functionality for free with optional one-time purchase and yearly subscription for advanced features like cloud sync and unlimited imports.

**Highlights:** Search online reference databases, Import metadata and PDFs, PDF annotation and markup, Barcode scanning for references, Cloud sync across devices, Share online libraries, Create multiple libraries

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $14.99 | per year |
| Standard | $14.99 | one-time |

**What reviewers like**

- 🚀 Seamless sync across devices
- 👍 Excellent PDF annotation tools
- 🔒 Reliable and stable
- 💡 Powerful reference management features
- 👍 Responsive and helpful developer support

**What reviewers complain about**

- 🐛 Sync issues with iCloud and PDF files
- 🔒 Subscription model for essential features
- 👎 Outdated and clunky user interface
- 🔒 Limited functionality on iOS without subscription

**Reported bugs**

- Incompatibility with iCloud Optimized Storage
- Unreliable sync between desktop and mobile versions
- Occasional data loss or corruption

**Requested features**

- Nested folders and tags for better organization
- Automatic PDF metadata extraction
- Improved search and filtering capabilities
- Seamless integration with third-party services


### Moonlight

[App page](https://appshunter.io/ios/app/moonlight-ai-pdf-reader/id6738034562)

Streamline your research by integrating AI tools directly into your PDF documents. Get instant explanations, translations, and citation details without leaving your reading interface.

**Highlights:** AI-powered explanations, Document translation, Citation retrieval, Integrated research tools, Seamless PDF interaction

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Bookends free?

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

### Is Moonlight free?

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

### Do Bookends or Moonlight have ads?

Neither Bookends nor Moonlight shows ads.

### Which is updated more often, Bookends or Moonlight?

Bookends ships an update every 2 months, and Moonlight every 10 days. Most recently, Bookends was updated on August 28, 2026 and Moonlight on September 18, 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.*