Comparison

NoteCaller vs Oken PDF Scanner

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

Head to head
About

NoteCaller

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Stop saving one-time callers to Contacts. NoteCaller is the easiest way to add notes to phone numbers, so you always remember who called and why. Perfect for deliveries, service calls, clients, rentals, and other unknown or temporary numbers. Why NoteCaller • Add notes to any phone number in seconds • Save name, email, address, and birthday • Call, message, WhatsApp, or share contact cards • Search by name, phone number, notes, email, or address • See created and last-updated history for every contact • Import from Share Sheet (plain text or vCard) • Automatic iCloud backup and restore • Private by design: no account, no ads, no tracking Built for iPhone with a clean, native experience that stays fast and focused. If you need a private phone number notes app for unknown callers, NoteCaller gives every number the context it deserves.

About

Oken PDF Scanner

Easily scan documents, receipts, and important paperwork using your phone's camera. Convert them into high-quality PDFs instantly, add your signature, and share them securely. Streamline your document management with a clean and fast interface.

Highlights
  • Scan documents with camera
  • Auto crop and enhance quality
  • Convert to PDF instantly
  • Add signatures
  • Save and share PDFs
  • Simple user experience
Features
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ScannerOK – PDF Scanner & Sign ScannerOK helps you scan documents and convert them into high-quality PDFs in seconds. Perfect for scanning receipts, notes, invoices, ID cards, forms, and important paperwork — anytime, anywhere. Key Features • Scan documents quickly using your camera • Auto crop and enhance scan quality • Convert scans into PDF instantly • Add signature to your documents • Save & share PDFs easily • Clean, fast and simple user experience Best For Students, business users, office documents, travel documents, and daily paperwork. Download ScannerOK and turn your iPhone into a smart document scanner today! Disclaimer : Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel your subscription anytime in your App Store account settings after purchase. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription. Privacy Policy https://cspdfscanner.com/privacy.html Terms of Use https://cspdfscanner.com/terms.html

Screenshots

NoteCaller4 screens
Oken PDF Scanner4 screens

Verdict

The call

The clearest difference is in-app purchases: NoteCaller at none against Oken PDF Scanner's 2. NoteCaller also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement 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. Oken PDF Scanner sells 2 in-app purchases, starting at $2.99 per month. NoteCaller asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 28, 2026 and November 9, 2026 respectively.

Scorecard2 real differences · 8 level
NoteCaller versus Oken PDF Scanner: the parameters behind the verdict, then further details
ParameterNoteCallerOken PDF Scanner
PriceFreeFree
Rating—4.8 (5 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—5 — better
Update frequencyMonthlyMonthly
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhoneiPhone, iPad — better
Requires iOS17.617.0 — better
Further details — not scored
Size7 MB21 MB
Age rating4+4+
DeveloperPriyank SharmaPratik Patel

In-app purchases

None

NoteCaller

No in-app purchases

2 purchases

Oken PDF Scanner

Subscriptions1
  • Premium for Monthly3 Days trial$2.991 Month
One-time1
  • Premium for Lifetime$29.99

Questions

Is NoteCaller free?
NoteCaller is free to download, with no in-app purchases.
Is Oken PDF Scanner free?
Oken PDF Scanner is free to download, with in-app purchases available.
Do NoteCaller or Oken PDF Scanner have ads?
Oken PDF Scanner shows ads; NoteCaller does not.
Which is updated more often, NoteCaller or Oken PDF Scanner?
NoteCaller ships an update monthly, and Oken PDF Scanner monthly. Most recently, NoteCaller was updated on October 28, 2026 and Oken PDF Scanner on November 9, 2026.

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