PDF Scanner vs Client Inbox
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PDF Scanner
Easily convert paper documents into searchable PDFs or JPGs with automatic cropping and enhancement. Features include OCR text recognition, smart filters, and batch scanning for efficient document management. Share your scanned files directly to various platforms and cloud services.
- One-tap scanning with auto edge detection
- Scan to PDF or JPG (single/multi-page)
- OCR text recognition for searchable PDFs
- Smart filters (Color, B/W, Greyscale)
- Batch scan and reorder pages
- Export and share to cloud drives
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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 • One-tap scanning with fast auto edge detection • Scan to PDF or JPG, single or multi-page • OCR text recognition for searchable PDFs and copyable text • Smart filters: Color, B/W, Greyscale, High-contrast • Fix perspective and straighten pages for a “flat” look • Batch scan and reorder pages in seconds • Export and share: Files, Mail, Messages, AirDrop, cloud drives • 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
Client Inbox
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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
Verdict
The clearest difference is in-app purchases: Client Inbox at none against PDF Scanner's 2. PDF Scanner's advantage is update cadence (every 5 days vs every 3 months). On price, ads, 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. PDF Scanner sells 2 in-app purchases, starting at $3.99 per month. Client Inbox asks for nothing beyond the download.
PDF Scanner ships an update every 5 days, Client Inbox every 3 months. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.
| Parameter | PDF Scanner | Client Inbox |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 days — better | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.6 | 16.4 — better |
| Further details — not scored | ||
| Size | 4 MB | 63 MB |
| Age rating | 4+ | 4+ |
| Developer | SUNG HSIANG CHAO | Cold Email Outreach |
In-app purchases
PDF Scanner
- Optic Premium Monthly$3.991 Month
- Optic Premium Yearly$29.991 Year
Client Inbox
No in-app purchases



