Collections and papers, as you organized them on the desktop. Highlights and notes go back to Mendeley or Zotero, and downloaded papers read offline.
Narrow the list with smart views, collections and tags in the sidebar — on the left on a tablet, on its own screen on a phone. Tap a paper to open it; if the PDF isn't on the device yet, Rectoly downloads it first.
Highlights, underlines and notes you make sync to Mendeley or Zotero as ordinary annotations, so they are waiting on your computer too.
⋯ › Download all missing PDFs puts the papers on screen on the device. Annotations made offline are sent when you're back online.
The Zotero edition reads and writes PDFs on the same WebDAV server as Zotero. The Mendeley edition browses your server and opens PDFs from it.
Use Open PDF… on the home screen, or Open with from another app. It isn't added to Mendeley or Zotero.
Rectoly runs on Android phones, tablets and E Ink devices such as Boox. The app comes from this site, and one purchase covers it together with iPad, Windows and Mac.