Your research library, everywhere
Read, annotate, and search your Zotero library on Android. Full-text PDF search, on-device OCR, and EU-hosted storage for individuals and research groups.
Read, annotate, and search your Zotero library on Android. Full-text PDF search, on-device OCR, and EU-hosted storage for individuals and research groups.
Zotero has no native mobile app with full-text search. Ridley fills that gap with on-device OCR, annotations, and text reflow.
Search inside your PDFs, not just titles. Full-text indexing finds text across your entire library in milliseconds.
Highlight, underline, and strikethrough with 5 colors. Add comments. Export annotations as Markdown. Syncs to Zotero desktop.
Scanned PDFs with no text layer? On-device text recognition extracts text locally on your phone. No cloud, no privacy trade-off.
Academic papers reflow to fit your screen. Adjustable font size turns any PDF into a comfortable read on small displays.
Format citations in APA, IEEE, Chicago, Nature, and 10,000+ styles. Powered by the OokCite API. 30 free lookups per day.
Read in the dark with color-inverted PDFs. Jump between chapters via table of contents. Resume where you left off.
Zotero gives 300 MB free. Research groups need more. Ridley provides EU-hosted storage with per-group access controls.
Zotero gives you 300 MB free. Ridley gives you 4 to 100 GB of EU-hosted storage. Sync directly from the app, no middleman.
Zotero blocked WebDAV for groups in 2013. Our extension removes that restriction. Per-group credentials, auto-configured.
Data stays in European data centers. Encrypted in transit and at rest. No US cloud intermediary.
Each group gets scoped credentials. Members access only their group. Admins control everything from one dashboard.
Sign in once in the Zotero extension. Groups, URLs, and credentials load automatically.
Pick a storage tier. Add group sync separately. No hidden fees. Annual billing saves 17%.
# Create your account https://my.turtletech.us # Pick a plan or start a free trial
# Download Ridley from Google Play # or sideload the APK Sign in with your Zotero account # Your library syncs automatically
# In Zotero: Edit > Settings > Sync File Syncing: WebDAV URL: zotero.turtletech.us # Enter your Ridley credentials
# From your Ridley dashboard: Create Group > name it > invite # Extension auto-detects groups # Members configure once, done
Start free. Add storage or group sync when you need it.
Example: Stack (8 GB) for a growing library = EUR 3/mo (mobile features included)
Free trial: 7 days on the Shelf plan (4 GB). No credit card required.
Annual billing saves 17% (pay for 10 months, get 12).