Comparison

PDF Scanner vs Client Inbox

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

Head to head
About

PDF Scanner

Features
Read full description

Turn paper into a clean, searchable PDF in seconds. Optic is a fast PDF scanner and doc scanner built for people who just want the file done. Capture, auto-crop, enhance, and export with almost zero thinking. KEY FEATURES β€’ One-tap scanning with fast auto edge detection β€’ Scan to PDF or JPG, single or multi-page β€’ OCR text recognition for searchable PDFs and copyable text β€’ Smart filters: Color, B/W, Greyscale, High-contrast β€’ Fix perspective and straighten pages for a β€œflat” look β€’ Batch scan and reorder pages in seconds β€’ Export and share: Files, Mail, Messages, AirDrop, cloud drives β€’ Create compact PDFs that stay crisp and easy to share MADE FOR Receipts, invoices, contracts, books, notes, forms, ID cards, whiteboards, and school handouts. PRIVACY BY DESIGN Your documents are yours. We’re built to minimize data collection and keep scanning simple. Upgrade note: Some advanced features (like Auto-Scan, unlimited OCR and exports) may require a subscription, depending on your plan. By using this app, you agree to the standard Apple Terms of Use (EULA). Privacy Policy: https://pdf-scanner.app/privacypolicy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Support: support@pdf-scanner.app

About

Client Inbox

Features
Read full description

Client Inbox helps you manage all lead and prospect conversations in one organized place. It brings every reply from your connected email accounts into a single, unified view so you can stay on top of your outreach no matter where you are. Messages sync in real time, giving you an up-to-date picture of every conversation as it happens. The clean interface makes it easy to read threads, search for specific leads, and respond quickly without missing important opportunities. Smart reply tools help you draft responses faster, while push notifications ensure you're immediately alerted when a prospect replies.

Screenshots

PDF Scanner4 screens
Client Inbox4 screens

Verdict

The call

The clearest difference is in-app purchases: Client Inbox at none against PDF Scanner's 2. Client Inbox also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.6). PDF Scanner's advantage is update cadence (every 5 days vs every 2 months). On price and ads there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. PDF Scanner sells 2 in-app purchases, starting at $3.99 per month. Client Inbox asks for nothing beyond the download.

UpkeepUpdate frequency

PDF Scanner ships an update every 5 days, Client Inbox every 2 months. The most recent releases landed on September 13, 2026 and September 8, 2026 respectively.

Scorecard4 real differences Β· 2 level
PDF Scanner versus Client Inbox: the parameters behind the verdict, then further details
ParameterPDF ScannerClient Inbox
PriceFreeFree
Update frequencyEvery 5 days β€” betterEvery 2 months
AdsNoNo
In-app purchasesYesNo β€” better
DevicesiPhoneiPhone, iPad, iPod β€” better
Requires iOS17.615.1 β€” better
Further details β€” not scored
Size4 MB45 MB
Age rating4+4+
DeveloperSUNG HSIANG CHAOCherwell Marketing Limited

In-app purchases

2 purchases

PDF Scanner

Subscriptions2
  • Optic Premium Monthly$3.991 Month
  • Optic Premium Yearly$29.991 Year
None

Client Inbox

No in-app purchases

Questions

Is PDF Scanner free?
PDF Scanner is free to download, with in-app purchases available.
Is Client Inbox free?
Client Inbox is free to download, with no in-app purchases.
Do PDF Scanner or Client Inbox have ads?
Neither PDF Scanner nor Client Inbox shows ads.
Which is updated more often, PDF Scanner or Client Inbox?
PDF Scanner ships an update every 5 days, and Client Inbox every 2 months. Most recently, PDF Scanner was updated on September 13, 2026 and Client Inbox on September 8, 2026.

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