PDF Scanner Document Converter vs iSign
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PDF Scanner Document Converter
Transform your phone into a portable scanner to digitize any document. Easily capture receipts, notes, or reports, save them as PDFs, and organize them with custom titles. Share your scanned files via email or save them for later printing.
- Scan any document
- Save as PDF
- Organize with titles
- Automatic scanning
- High-quality output
- Share via email
- Save to gallery
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Scan Master turns your iPhone into a document scanner, PDF converter, and OCR text reader. Scan paper to PDF in seconds, convert it to Word, JPG, or TXT, then sign, annotate, and share. Contracts, invoices, receipts, tax returns, medical records, notes, textbook pages. Everything stays sharp and organized. Get perfect scans - AI Enhanced clears shadows, glare, and desk lamp reflections, so a page shot in a normal room still comes out clean - Straighten fixes the angle for you, no lining the page up perfectly or holding the phone flat - Switch between color, grayscale, and high-contrast black and white depending on what you are scanning - Set the look once and apply it to the whole document instead of page by page Multi-language text recognition - Pull the text out of a scan so you can search, copy, and reuse it instead of retyping the page - Detects the language for you, or pick one yourself - Fix a typo or reformat the result before you send it, right inside the app - Copy it as plain text, or export as PDF, DOC, or TXT Sign and mark up without printing - Sign a contract and send it back in a minute, no printer, no scanner, no trip to the office - Draw your signature once and reuse it on everything after that - Highlight the clause that matters, or leave a note for whoever reads it next - Add a stamp or your own watermark before the file leaves your phone Export in the format you need - PDF to file it, JPG to share it, DOC or TXT when you still need to edit it - Send only the pages that matter instead of the whole document - Adjust size and quality so the file is small enough to email - Straight out to email, AirDrop, print, or Files Your documents stay on your device Tax returns, contracts, medical records, and ID documents are not the kind of files that belong on someone else's server. Scan Master scans, processes, and stores everything locally on your iPhone. - Your documents are never uploaded, and no account is required - Text recognition runs on your iPhone, not in the cloud - Lock individual documents behind a password - Add encryption to any file before you export it Scan Master Premium Scan Master is free to use. Premium unlocks batch file import, watermark-free export, file encryption, OCR result export, and advanced editing: signatures, markup, comments, stamps, and custom watermarks. Free users can export one page at a time with a Scan Master watermark. Selecting multiple pages requires Premium. Privacy Policy: https://scanmaster.io/scan-master-privacy-policy.html Terms of Use: https://scanmaster.io/scan-master-terms-conditions.html Questions or suggestions? Email us at getsupport@scanmaster.io.
iSign
Transform any document into a searchable, signable PDF. Scan, organize, and edit with AI-powered summaries and OCR. Your data remains private on your device.
- Scan documents to PDF
- Automatic edge detection
- Edit and sign documents
- OCR text recognition
- AI-powered summaries
- On-device data storage
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Turn any document into a searchable, signable PDF — in seconds. Sherlock is the fastest way to scan, organize, sign, and understand your documents. Whether it's a contract, a receipt, or a handwritten note — just point your camera and you're done. SCAN TO PDF INSTANTLY Use your camera to capture any document with automatic edge detection and perspective correction. Sherlock produces crisp, high-quality PDFs every time — no flatbed scanner needed. EDIT & SIGN DOCUMENTS Add your signature, insert text, draw annotations, and reorder pages directly inside the app. Send signed contracts in minutes, not days. OCR TEXT RECOGNITION Sherlock reads your scanned documents and extracts all the text, making it searchable and copyable. Find any word inside any document, instantly. AI-POWERED SUMMARIES Paste any document or text and get a clear, concise summary in seconds. Ask follow-up questions to refine and dig deeper, like having a personal assistant for your paperwork. YOUR DATA STAYS PRIVATE Documents are stored exclusively on your device. Nothing is uploaded to the cloud without your consent. Your files are yours always. PERFECT FOR: - Freelancers & remote workers signing contracts on the go - Students digitizing class notes and textbooks - Anyone who wants to go paperless at home - Professionals managing receipts, invoices, and legal documents Try free for 3 days. No commitment. Start your trial and see why Sherlock is the last document app you'll ever need. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: iSign at 100% against PDF Scanner Document Converter's 32%. iSign also leads on rating (5.0 vs 4.5) and ads (none vs shown). PDF Scanner Document Converter's advantage is ratings volume (534 vs 1) and iOS requirement (16.0 vs 18.0). On price, update cadence, in-app purchases and monetization model 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 Document Converter sells 5 in-app purchases, starting at $9.99 per month and iSign sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
iSign holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: PDF Scanner Document Converter has 534 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 32% of PDF Scanner Document Converter's written reviews are positive against 100% of iSign's.
PDF Scanner Document Converter ships an update every 2 weeks, iSign fortnightly. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.
| Parameter | PDF Scanner Document Converter | iSign |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (534 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 31.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 534 — better | 1 |
| Update frequency | Every 2 weeks | Fortnightly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 148 MB | 69 MB |
| Age rating | 4+ | 4+ |
| Developer | 兰 陈 | Bruno Wide |
Customer experience
PDF Scanner Document Converter
iSign
Bugs and requests
PDF Scanner Document Converter
Reported bugs
6 issues- App crashes on launch
- Scan quality is unreadable
- App keeps asking to sign up despite active account
- Files not emailing properly
- Incompatibility with iPhone 5S
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- Scanning fails to process documents
Requested features
4 requests- Easy in-app cancellation option
- Color scan option
- Genuine free trial without credit card requirement
- Better customer support channels
iSign
Not enough reviews yet to summarise bugs or requests.
In-app purchases
PDF Scanner Document Converter
- Monthly Plan7 Days trial$9.991 Month
- PDF Scanner Converter$9.997 Days
- Weekly Plan3 Days trial$9.997 Days
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- PDF Document Scanner3 Days trial$59.991 Year
- Document Scanner App$69.991 Year
iSign
- Scanner Pro - Monthly Promo$0.991 Month
- Scanner Pro - Monthly$1.991 Month
- Scanner Pro - Yearly Promo$9.991 Year
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- Scanner Pro - Yearly$19.991 Year
Questions
Is PDF Scanner Document Converter free?
Is iSign free?
Which has better reviews, PDF Scanner Document Converter or iSign?
Do PDF Scanner Document Converter or iSign have ads?
Which is updated more often, PDF Scanner Document Converter or iSign?
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