NoteCaller vs Oken PDF Scanner
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
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.
- Scan documents with camera
- Auto crop and enhance quality
- Convert to PDF instantly
- Add signatures
- Save and share PDFs
- Simple user experience
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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
Verdict
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
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.
Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 28, 2026 and November 9, 2026 respectively.
| Parameter | NoteCaller | Oken PDF Scanner |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.8 (5 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 5 — better |
| Update frequency | Monthly | Monthly |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Priyank Sharma | Pratik Patel |
In-app purchases
NoteCaller
No in-app purchases
Oken PDF Scanner
- Premium for Monthly3 Days trial$2.991 Month
- Premium for Lifetime$29.99









