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
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Terms of Service: http://www.sonnysoftware.com/bookendsontap/termsofservice/