# Bookends vs References On Tap

Bookends and References On Tap both sit at 4.7 stars, but that hides the real split: 76% of Bookends's written reviews are positive against 50% of References On Tap's. References On Tap's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 17.6). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Bookends sells 2 in-app purchases, starting at $14.99 per year and References On Tap sells 2 in-app purchases, starting at $4.99 per year. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for Bookends against 4.7 for References On Tap. Both are backed by a comparable volume of ratings — 394 and 304 respectively. Written reviews are what separate them: 76% of Bookends's written reviews are positive against 50% of References On Tap's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on August 28, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Bookends | References On Tap |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (394 ratings)](https://appshunter.io/ios/app/bookends/id739087947/reviews) | [4.7 (304 ratings)](https://appshunter.io/ios/app/references-on-tap/id1092709557/reviews) |
| Number of ratings | **394** | 304 |
| Positive reviews | **76.4% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 111 MB | 68 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Sonny Software, LLC](https://appshunter.io/developer/417583547) | [ReferencesOnTap](https://appshunter.io/developer/301316543) |

## 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


### References On Tap

[App page](https://appshunter.io/ios/app/references-on-tap/id1092709557)

This app helps you find, display, and import reference information and PDFs from various academic databases. Organize your references into groups, perform advanced searches, and sync your library across devices. It offers both a one-time purchase for core features and a subscription for cloud syncing.

**Highlights:** Search academic databases (arXiv, Google Scholar, PubMed, etc.), Import reference information and PDFs, Organize references in static and smart groups, Advanced boolean and full-text search options, Sync libraries across iOS and macOS devices via iCloud, Share references for reading or import

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | per year |
| Standard | $4.99 | one-time |


## Frequently asked questions

### Is Bookends free?

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

### Is References On Tap free?

References On Tap is free to download, with in-app purchases available.

### Which has better reviews, Bookends or References On Tap?

Bookends and References On Tap are both rated 4.7 out of 5 on the App Store, from 394 and 304 ratings respectively.

### Do Bookends or References On Tap have ads?

Neither Bookends nor References On Tap shows ads.

### Which is updated more often, Bookends or References On Tap?

Bookends ships an update every 2 months, and References On Tap every 2 months. Most recently, Bookends was updated on August 28, 2026 and References On Tap on September 21, 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.*