Bookends is a reference management app for your iPad, iPhone, and iPod touch. You can search Amazon, arXiv, Google Books, Google Scholar, JSTOR, the Library of Congress, PubMed, PubMed Central, and Web of Science (requires access privileges and ip authentication) for references and download them, with pdfs (requires access privileges), to your personal library. Use the built-in browser to access Web sites (EZProxy compliant). Organize your references by groups (static and smart), annotate your pdfs directly within Bookends, and email references from your device to yourself or others in a form suitable for reading or importing into reference management applications. Autofill references from the internet by DOI or ISBN. Scan barcodes.

Use iCloud to sync all your libraries and attachments across iOS devices and with Bookends running on the Mac, and have full access to your references and sources whether you're at your desk or on the go.

Bookends for iOS without a Standard Version in-app purchase is limited in the following ways: searches return a maximum of 20 references, only 50 references can be stored in your local database, PDFs that you annotate on the iOS device are watermarked, and ads are shown. To have full access without these restrictions you must make a purchase from within the app ("in-app purchase”).

Pro Features Yearly Subscription (cloud sync of references and attachments, multi-library support, unlimited barcode scans) is a separate in-app purchase ($9.99) and requires a susbcription that is renewable on a yearly basis.
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, Pro Features will be disabled.

No cancellation of the current subscription is allowed during the active subscription period.

Standard Version - $9.99
Pro Features Yearly Subscription - $9.99

• If you like Bookends, please take the time to give us a nice review: it really helps.

Privacy Policy:
Terms of Service:

What’s New

Version 3.3.8

• PDFs now can be shared as "Open In" instead of "Copy To" to allow editing file in another app without needing to send the file back to Bookends.
• Bookends Attachments folder is now visible in for files stored locally. When Cloud Sync is used all files are stored in the Bookends folder in iCloud Drive.
• Generation of links to references that can be inserted into other apps.
• Cross linking support with DEVONthink (with their next update).
• Bookends for iOS can generate uniqueID number for references without interacting with Bookends for Mac.
• Bookends Wi-Fi sync improvements for the Selected Groups sync mode.
• Fixed a bug when Notes screen was automatically closed on app switching.
• Fixed a problem with downloading CSL files from the internal web browser.

• If you like Bookends, please take the time to give us a nice review: It really helps.

Ratings and Reviews

4.4 out of 5
15 Ratings

15 Ratings

sar.kost ,

no sync

I bought it for mac and iOS to read and cite my papers in both platforms. But most attachments are not synced in iPad from my Mac. Really disappointing...
Update: after reading carefully the instructions on the website, syncing was successfully set up. But the whole process is complex and it took me a while to understand it and set it up. It will be nice to be more simple and straight forward.

Developer Response ,

Update: Cloud Sync of attachments requires all attachments on Mac to be placed to the special folder in iCloud Drive which should be created by macOS. But this initial setup should be done just once and everything else should just work after the first sync.

Note: for those who are reading this message, we have a forum on our web site and a support email link in the Bookends About section. These are the preferred ways of reporting bugs or sending feature requests. The “Cloud Sync” section in our docs has detailed instructions on how to sync both libraries, if something isn’t clear please tell us and we will try to make the explanation clearer.


Onlusten 50 references are allowed. Useless software.

Only 50 references are allowed. It is impossible to make the in app purchase. Another example of a company that makers useless software.

Developer Response ,

We don’t process transactions, everything is done by Apple, so you should contact them directly if you're having a problem. You might also google “Why can’t I get in-app purchases?”. There are some suggestions from users having the same problem with other apps. For examples, check to make sure that in-app purchases isn't turned off on your iOS device. Or try to sign out of your iTunes account and then try to purchase.


Sonny Software, LLC
95.7 MB

Requires iOS 10.0 or later. Compatible with iPhone, iPad and iPod touch.



Age Rating
Rated 4+
© Sonny Software
In-App Purchases
  1. Standard Version € 10,99
  2. Pro Features Yearly € 10,49


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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