Your important documents and notes, kept on your device — not someone else's cloud.
ctLibrary™ is a quiet, offline library for the files you need to find fast: PDFs, work procedures, emergency references, household paperwork, and your own notes. Organized into folders. Searchable in a tap. Yours.
No account · Works in airplane mode · Your files never leave your device unless you turn on sync
The document you need is always in the wrong place.
It's in an email thread from March. Or a cloud drive that wants you to sign in again. Or a downloads folder with 400 other files. When you actually need it — in the field, in a meeting, with no signal — it's the one thing you can't open.
Somewhere between Gmail, Drive, and Files. By the time you find it, the job's half done.
Field materials are useless when they need a sign-in on a different device with no signal.
Notes app, group chat, sticky on the desk — none of them next to the PDF the note is about.
ctLibrary™ puts the documents and the notes about them in one organized place that works whether or not you have signal.
Three steps. Then everything is one search away.
A simple two-level structure — folders hold categories, categories hold documents and notes together — that you can shape to anything.
Bring your files in
Share a PDF into ctLibrary™ from Mail, Files, Safari, or your cloud-drive app — or pick files manually. It's copied into private storage, so it stays put even if the original disappears.
Organize into folders and categories
A "Radio Guides" category can hold a PDF manual, a spreadsheet, and your own troubleshooting note — side by side, where you'd actually look for them.
Find it offline, in a tap
Search runs on your device across titles, file names, and tags — case-insensitive and instant. Open PDFs in-app with pinch-to-zoom. No signal required.
A reference library that respects your time.
Useful the moment you open it — not after a 20-minute setup ritual.
PDFs open in-app
Tap a PDF and read it right inside ctLibrary™ — scroll, pinch to zoom, share, done. No bounce to another app.
Notes that live next to the docs
Type a quick procedure, troubleshooting tip, or reminder — and file it in the same category as the PDF it's about.
One search across everything
Documents and notes are searched together by title, file name, and tag. Filter to PDFs, notes, favorites, or a single category to narrow it down.
Import from anywhere
Share into ctLibrary™ from email, browsers, the Files app, cloud drives, and other apps — or pick from the device file picker.
Previews for common formats
Images, text, Markdown, and CSV preview in-app. Word, Excel, and PowerPoint preview when possible — otherwise open with another app in one tap.
Works fully offline
Browse folders, open PDFs, search, and write notes with airplane mode on. No connection required after install.
The honest version of "your data is safe."
Most apps say that and mean "it's on our servers, encrypted." ctLibrary™ means something simpler: it isn't on our servers at all. Here's the literal accounting.
Built for people who need the right document, right now.
Intentionally flexible. Here are a few shapes it tends to take.
Emergency management
ICS forms, radio guides, channel plans, and the troubleshooting notes you wrote at 2 a.m. last March — reachable on a phone with no signal.
Procedures & policies
The employee handbook, vendor docs, meeting notes, and the PTO instructions you keep re-asking HR for.
Important paperwork
Insurance cards, warranty PDFs, appliance manuals, and the wifi password your guest always asks for.
Manuals & forms
Course materials, study guides, and your own notes alongside them — together in one searchable place.
Free to start. Free to keep going — we just ask for an email.
Use the app the moment you install it, no sign-up. When you're ready for an unlimited library, a one-time 6-digit email code lifts the starter caps. No subscription, no card, no marketing email, no upsell.
$0
- Up to 5 documents and 5 notes
- Up to 2 folders, 2 categories each
- In-app PDF viewing & offline search
- Sharing out to other apps is disabled until you verify
$0
- Unlimited documents and notes
- Unlimited folders and categories
- Share documents and notes to any app
- Optional sync — your own iCloud (iOS) or Google Drive (Android)
- Optional App Lock with biometrics
No reviews to fake. Just things you can verify.
ctLibrary™ is new, so we won't paste invented five-star quotes. Here's what's true on day one — check any of it against the app or the Privacy Policy.
store your documents — they live on your device.
no analytics, no ad SDKs, no behavioral tracking.
the only data we ever receive, and only if you verify.
U.S.-based support replies same business day (ET).
Used the app? An honest App Store or Google Play review helps other people find it. Verified reviews will appear here as they come in.
Put your important files somewhere you'll actually find them.
Free on the App Store and Google Play. Open the app, create your first folder, and start importing.
Questions skeptical people ask first.
Does ctLibrary™ upload my documents anywhere?
Is it really free, or is there a catch later?
What do you do with my email address?
Do I need an account or a password?
How does search work — does it read inside my files?
What file types can I keep in it?
Will it work with no signal?
Can I lock the app with a password or Face ID?
What devices does ctLibrary™ support?
One organized place for everything you need to keep handy.
Free. No account. Nothing leaves your phone unless you say so.