Cerna: Document Finder

The important stuff hides on your phone.

A contract you signed once. A receipt you'll need at tax time. Your insurance card. An API key you pasted into a note and forgot about. It's all in there, buried in Documents, in Download folders, in photos of paperwork, right up until the moment you actually need it.

Cerna finds it.

Point Cerna at a folder and it surfaces what matters: receipts, invoices, IDs, insurance, contracts, statements, tax forms, medical records, travel documents, warranties, manuals. Sorted, with the noise kept out of your way. Add your own categories for anything else. And every bit of it happens on your phone.

WHY CERNA IS DIFFERENT

• On your phone, only. Cerna has no internet permission at all, so nothing you scan can leave your phone. No account, no cloud, no server that can leak.
• Patterns, not a black box. Cerna recognizes documents by their shape: a policy number, an API key, a card's contact block. It doesn't send your files to anyone's AI. It works offline, on a plane.
• Reads photos and scans. A photo of a receipt or a scanned PDF is read with on-device text recognition, so it's as findable as any other document.
• Pay once. One price, no subscription, because there's no server to pay for.

WHAT IT DOES

• Surfaces the important documents you forgot you had
• Sorts them automatically: receipts, invoices, IDs, insurance, contracts, tax, statements, medical, legal, travel, warranties, manuals, education, music
• Make your own categories for anything Cerna doesn't have a name for. Your choice sticks; Cerna won't re-file it
• Search everything by what's inside it, not just the filename
• Indexes music and video by the file's own tags (title, artist, album)
• Scan a folder again any time to pick up what you've added since, without duplicates
• Save to Cerna from any app's share menu: PDFs, photos, files, shared text
• Reads business cards straight into your contacts app
• Finds exposed secrets (API keys and passwords sitting in plain files). Copy one out (Cerna clears it after a minute) or stash it in an encrypted vault that never leaves your phone
• Reminds you before things expire: insurance, licenses, renewals
• Exports receipts and invoices to a spreadsheet for taxes and reimbursement
• Shows where every document lives, and opens the original in a tap
• Archive to .zip, export, or print any document, category or selection
• Tidies up: duplicates, stale downloads, and your biggest files

Built for people who run things from their phone, and are done paying monthly for the privilege.

One price. No subscription. Runs entirely on your phone.