Comparison

SecureDoc · Document Vault AI vs Proof Locker

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SecureDoc · Document Vault AI

Features
Read full description

Your documents deserve better than a shoebox — and more privacy than a cloud. SecureDoc turns your iPhone into a private, AI-powered document vault. Scan receipts, contracts, invoices, medical records, or any paperwork — and find them again in seconds. Everything stays on your device by default. No third-party servers. You decide whether your documents stay only on your device or sync through your own Apple iCloud. Just you and your documents. PRIVATE BY DESIGN Unlike other scanner apps, SecureDoc never sends your files to third-party servers. All scanning, OCR, and AI processing happens entirely on your device. You're in control: keep everything strictly on your device, or use your own Apple iCloud to sync between iPhone and iPad — the choice is always yours. Your sensitive documents — tax returns, medical records, IDs — stay where they belong: with you. SCAN & UNDERSTAND Point your camera at any document and let AI do the rest. Multi-page scanning creates searchable PDFs instantly. On-device OCR extracts text in multiple languages, while smart AI generates summaries and detects the document language — all without an internet connection. NEVER MISS AN EXPIRY SecureDoc automatically detects expiration dates on passports, ID cards, driver's licenses, insurance policies and more — and reminds you in time: 180, 90, 30 and 7 days before a document expires. The new alerts bell also tracks payment due dates and appointments, and you can add any deadline to your calendar with one tap. SAVE FROM ANYWHERE The new Share Extension saves PDFs and photos from Mail, Safari or Files straight into SecureDoc — choose the name and folder as you save, while duplicate detection warns you if you already have the file. Home Screen widgets and Shortcuts keep expiring documents and Quick Scan one tap away. ORGANIZE EFFORTLESSLY Stop searching through piles. Sort documents into categories, add custom tags, and use full-text search to find any receipt, contract, or invoice in seconds. Collapse categories for a clean overview, or filter by date, tags, and type. Select multiple documents to move or delete them at once, drag & drop them between folders, or long-press a folder to rename it. LOCKED DOWN TIGHT Protect your document vault with Face ID, Touch ID, or a PIN code. A recovery code ensures you're never locked out. Your files are secured in the iOS Keychain — the same security used by banking apps. BACKUP ON YOUR TERMS Create complete ZIP backups of your entire library — metadata, tags, and files included. Save them wherever YOU choose: external drive, USB, or your own NAS. Restore or merge backups anytime. Or use Apple iCloud storage to use the app on both iPhone and iPad. START FREE Scan and organize up to 15 documents completely free. Upgrade to SecureDoc Pro for unlimited documents and full access to every feature. Why people choose SecureDoc over other scanners: 100% on-device — no third-party servers, no data leaks Face ID / Touch ID protection AI-powered OCR + smart summaries Categories, tags & full-text search Multi-page PDF scanning Backup & restore as ZIP Clean, intuitive design No ads. Ever. Terms of Use (EULA): https://www.varadzin.com/terms-of-use-eula-for-securedoc/ Privacy Policy: https://www.varadzin.com/privacy-policy-for-securedoc/

About

Proof Locker

Organize and export important documents, agreements, and photo-backed records as clear PDF reports. This local-first app keeps your data on your device, giving you control over sharing and export.

Highlights
  • Create proof files and agreement records
  • Add photos and factual notes
  • Timestamp and GPS address stamps
  • Export PDF reports
  • Local-first data storage
  • Edit and filter saved records
  • Advanced PDF layouts and signature tools
Features
Read full description

Keep important records organized and ready to export. Proof Locker is a local-first documentation app for creating proof files, agreement records, photo-backed records, and clear PDF reports. Records and photos remain on your device unless you choose to export or share them. STARTER ACCESS • Create up to 3 total records • Add up to 5 photos per record • Create categorized proof files and agreement records • Add factual notes, custom details, timestamps, and optional GPS address stamps • Export 1 total PDF report OPTIONAL PLUS SUBSCRIPTION — IN-APP PURCHASE REQUIRED • Store up to 100 local records • Add up to 20 photos per record • Unlimited PDF exports while subscribed • Edit existing records • Search and filter saved records • Export an all-records summary OPTIONAL PRO SUBSCRIPTION — IN-APP PURCHASE REQUIRED • Unlimited local records • Add up to 50 photos per record • Everything included with Plus • Complete chronological record timeline • Record duplication • Advanced PDF layouts, covers, headers, and footers • Signature tools • Printable notary sections LOCAL-FIRST STORAGE Proof Locker does not store proof files or photos on developer-paid cloud file storage. You control when and where records are exported. Because records are stored locally, deleting the app may remove them, so export important records to a backup location you control. SUBSCRIPTIONS Plus and Pro are optional monthly auto-renewing subscriptions purchased through Apple In-App Purchase. Payment is charged to your Apple ID. Subscriptions automatically renew unless canceled before the renewal date. Manage or cancel subscriptions in Apple subscription settings. Restore Purchases is available inside the app. Proof Locker organizes user-created documentation for personal records. It does not certify, verify, notarize, authenticate identities, determine legal validity, or provide legal advice. GPS address data may be approximate. Privacy Policy: https://ironstrikerevival.com/proof-locker-privacy-policy/ Terms of Use: https://ironstrikerevival.com/proof-locker-terms-of-use/

Screenshots

SecureDoc · Document Vault AI4 screens
Proof Locker4 screens

Verdict

The call

The clearest difference is ads: SecureDoc · Document Vault AI at none against Proof Locker's shown. Proof Locker's advantage is update cadence (every 8 days vs every 3 weeks) and iOS requirement (15.1 vs 17.6). On price, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. SecureDoc · Document Vault AI sells 3 in-app purchases, starting at $2.99 per month and Proof Locker sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

SecureDoc · Document Vault AI ships an update every 3 weeks, Proof Locker every 8 days. The most recent releases landed on September 18, 2026 and July 24, 2026 respectively.

Scorecard3 real differences · 7 level
SecureDoc · Document Vault AI versus Proof Locker: the parameters behind the verdict, then further details
ParameterSecureDoc · Document Vault AIProof Locker
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 3 weeksEvery 8 days — better
AdsNo — betterYes
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.615.1 — better
Further details — not scored
Size28 MB48 MB
Age rating4+4+
DeveloperFrantisek VaradzinJustin Cummins

In-app purchases

3 purchases

SecureDoc · Document Vault AI

Subscriptions3
  • SecureDoc PRO$2.991 Month
  • English$3.991 Month
  • Unlimited Access$24.991 Year
2 purchases

Proof Locker

Subscriptions2
  • Proof Locker Plus$6.991 Month
  • Proof Locker Pro$12.991 Month

Questions

Is SecureDoc · Document Vault AI free?
SecureDoc · Document Vault AI is free to download, with in-app purchases available.
Is Proof Locker free?
Proof Locker is free to download, with in-app purchases available.
Do SecureDoc · Document Vault AI or Proof Locker have ads?
Proof Locker shows ads; SecureDoc · Document Vault AI does not.
Which is updated more often, SecureDoc · Document Vault AI or Proof Locker?
SecureDoc · Document Vault AI ships an update every 3 weeks, and Proof Locker every 8 days. Most recently, SecureDoc · Document Vault AI was updated on September 18, 2026 and Proof Locker on July 24, 2026.

Other comparisons