Zandy

Access your Zotero library from your mobile device. Edit and view your library,
sync, and work offline. Zandy provides a simple interface to all your research.
Browse and modify the items in your library, add new items, view attachments,
take and edit item notes, search your library, add webpages from the Android
browser and more.

The barcode functionality requires https://f-droid.org/packages/com.google.zxing.client.android to be
installed.