Bookends vs References On Tap
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Bookends
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.
- 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
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Bookends is the reference management app you've been looking for. The basic version offers: • Search online sites directly (arXiv, Google Books, Google Scholar, JSTOR, the Library of Congress, PubMed, PubMed Central, and Semantic Scholar) or use the built-in browser (EZProxy-compliant) to download reference metadata and PDFs (access privileges required). Searches can return a maximum of 20 references, and only 50 references can be stored in your personal database. • Use unique identifiers such as DOI, PMID, ISBN, or arXiv id to autofill references. • View the text of PDF annotations in a note stream, and create your own with our powerful PDF markup engine. • Barcode scanning, one per day. • And many more features designed to help you discover, organize, and use reference information. Standard, one-time purchase ($14.99): • No limit on searches or importing. Premium, yearly subscription ($14.99). Requires a Standard purchase. • Cloud sync with all your iOS devices and Bookends for Mac (separate purchase). • Share online libraries with colleagues. • Scan documents with Mellel Mobile*. • Create multiple libraries. • Unlimited barcode scanning. • Extract PDF annotations with deep links to annotations and text. • Convenient UI to add PDF notes to the library. • Automate your actions with Shortcuts. * iPad-only. Requires a Mellel Mobile Premium subscription. Subscription is for one year and has an auto-renew option. The subscription can be managed in iOS -> Settings > [your name] > Subscriptions. A subscription will renew if it isn't canceled at least 24 hours before the renewal date. If the subscription is not renewed, Premium will be disabled but Standard will continue to work. Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
References On Tap
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.
- 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
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••• Check out Bookends - References' big brother ••• References searches arXiv, Google Books, Google Scholar, JSTOR, the Library of Congress, PubMed, PubMed Central, and Semantic Scholar to find, display, and import reference information and pdfs of the full article (if you have access privileges). You can search your personal reference library, organize your references in groups (static and smart), and share references in a form suitable for reading or importing into desktop reference management applications. Many features are optimized for reference retrieval and management (advanced boolean searches, search for Full Text or Free Full text, recall recent searches, etc.). Use iCloud to sync all your libraries and attachments across iOS and macOS devices, and have full access to your references and sources when you're on the go. Standard, one-time purchase ($4.99): • No limit on searches or importing. Premium, yearly subscription ($4.99). Requires a Standard purchase. • Cloud sync with all your iOS and macOS devices. Subscription is for one year and can be auto-renewable. The subscription can be managed in iOS -> Settings > iTunes & App Store > Subscriptions. The subscription might renew if it wasn't canceled more than 24 hours before the renewal date. If the subscription is not renewed, Premium will be disabled. Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Bookends | References On Tap |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (394 ratings) | 4.7 (304 ratings) |
| Positive reviews | 76.4% of reviews — better | 50.0% of reviews |
| Number of ratings | 394 — better | 304 |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 111 MB | 68 MB |
| Age rating | 4+ | 4+ |
| Developer | Sonny Software, LLC | ReferencesOnTap |
Customer experience
Bookends
References On Tap
Bugs and requests
Bookends
Reported bugs
3 issues- Incompatibility with iCloud Optimized Storage
- Unreliable sync between desktop and mobile versions
- Occasional data loss or corruption
Requested features
4 requests- 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
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Bookends
- Premium3 Months trial$14.991 Year
- Standard$14.99
References On Tap
- Premium$4.991 Year
- Standard$4.99
Questions
Is Bookends free?
Is References On Tap free?
Which has better reviews, Bookends or References On Tap?
Do Bookends or References On Tap have ads?
Which is updated more often, Bookends or References On Tap?
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