Read and annotate your Mendeley papers — right in Reading Mode. Two-column PDFs reflow into clean single-column text. Highlights and notes sync back to Mendeley.
Rectoly is the research-focused PDF reader built for Mendeley users. Your library stays in Mendeley — Rectoly makes reading and annotating on iPhone, iPad and Mac a genuine pleasure.
READING MODE
Academic papers are usually typeset in two columns, which makes them hard to read on a phone or in a narrow split view. Reading Mode reflows the paper into a single, clean text column — without losing the original PDF.
ANNOTATE IN READING MODE
Unlike other readers, Rectoly lets you highlight, underline, add sticky notes, and write with Apple Pencil — all while staying in Reading Mode. Your handwriting even scales with the text size. Filter annotations by colour and by kind.
ON-DEVICE TRANSLATION
Read an English paper in your own language, in Reading Mode and on the PDF page. Translation runs on this device; the paper is never sent to a translation service. Translations are saved to your Mendeley library for your other devices (you can turn this off in Settings). The app's translation model (about 2.5 GB) needs 8 GB of memory or more. Translates English papers into the app's 19 other display languages: Hindi by the system's translator (iOS 26 or later), all the rest by the app's own model.
READ ALOUD
Hear the text in Reading Mode, in the system voice or the VoiceOver one.
SOFT DARK
A paper-friendly dark mode that dims the page itself, not just the interface.
WORKBENCH (iPad and Mac)
Pin Figure 1 beside the text and keep reading — no more scrolling back and forth between a figure and the paragraph that cites it.
RESEARCH THEMES
Send a passage to a theme, with its source. Keep the theme beside the paper, or open it as a sheet. Export as Markdown or Word (.docx).
ACROSS PAPERS
The library column has a new Across papers tab: search the annotations, the text and your handwriting in your whole library at once.
FIGURES, TABLES AND A COMPARISON TABLE
Figures to PNG, tables to CSV — and one table comparing many papers' abstracts, methods and results.
YOUR MANUSCRIPT BESIDE THE PAPER
Open the document you are writing (.docx, .doc, .odt, .rtf, Markdown, plain text — password-protected ones too) in a column next to the paper. It re-reads the file every time you save.
CITATIONS AND NOTES, OUT OF THE APP
Copy with page, copy BibTeX or citation keys, and a Notes folder for Obsidian and others — with keyboard shortcuts you can change.
MENDELEY SYNC
Sign in with your Mendeley account and read your library directly on iPhone, iPad and Mac. Highlights and text notes are saved into the PDF and written back to Mendeley.
OPEN FROM WEBDAV
Open PDFs kept on a WebDAV server such as Nextcloud or your university's storage — and add them to Mendeley from there.
A LIBRARY THAT STAYS OUT OF YOUR WAY
- PDFs download only when you open them, saving storage
- Downloaded papers work fully offline — flights, commutes, conferences, field work
APPLE PENCIL, PRESERVED
Handwritten notes are backed up with iCloud, kept with a version history you can restore, and exportable as JSON for long-term preservation. Your research is never locked inside Rectoly.
14-DAY FREE TRIAL → ONE-TIME PURCHASE
Try every Pro feature free for 14 days. Unlock with a single one-time payment — no subscription, no recurring charges, no lock-in.
Rectoly is an independent app and is not affiliated with, endorsed by, or sponsored by Mendeley Ltd. or Elsevier. A Mendeley account is required to use this app.
Ratings & Reviews
5.0
out of 5
1 Ratings
Send diagnostic data without email
• Settings › Troubleshooting › “Send diagnostic data” now sends the data straight from the app — no mail app or account needed. You get a receipt number to tell us if you are already in touch, and the data is deleted after 30 days.
Also
• Lasso: circle handwriting on a PDF and move it together (iPad and Mac).
• You can now sign in with an email address. Even without Mendeley, a trial or a purchase also works in Rectoly on your other devices (from “Don’t use Mendeley? Continue with email” on the purchase screen).
• Highlighting or underlining the same passage again removes the mark; with another color it changes the color.
• The sidebar now has a close button.
Fixes and improvements
• Fixed handwriting looking blurry when a PDF is zoomed in (iPad).
• A brief network drop is no longer shown as a sync failure: your changes stay on the device and are sent again automatically.
• Reading Mode now shows the Schemes of chemistry papers as figures.
• The purchase screen now says up front that the free trial never charges you automatically.
Version 5.1.2
The developer, Takaki Takemura, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
Purchases
Contact Info
Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Identifiers
Usage Data
Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
The developer indicated that this app supports the following accessibility features. Learn More