Comparison

PDF Scanner vs KD DFU

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

Head to head

About

PDF Scanner

Turn your iPhone into a portable scanner to capture documents, receipts, and IDs. Extract text with OCR and organize your scans with folders. Export files as PDFs or JPEGs and share them easily.

Highlights

Smart document edge detection
OCR text extraction
Multi-page PDF creation
Organize scans with folders
Export as PDF or JPEG
Share via cloud services

Read full description

Transform your iPhone into a powerful portable PDF scanner and OCR document manager. Scan receipts, contracts, notes, invoices, business cards, whiteboards, IDs, passports, and documents in seconds. Convert scans into high-quality PDFs or JPEGs with smart edge detection and advanced text recognition. KEY FEATURES 1. Smart Document Scanner • Auto-detects document edges • Corrects perspective distortion • Enhances scans in color, grayscale, or black & white • Create multi-page PDF documents 2. OCR Text Recognition • Extract text instantly from scanned documents • Extract and copy text from any document • On-device processing for privacy 3. Smart File Management • Organize scans with folders and subfolders • Rename and manage documents easily 4. Flexible Export & Sharing • Export as PDF or JPEG • Share via Mail, WhatsApp, Google Drive, Dropbox, and more 5. Premium Experience • Beautiful dark mode interface • Fast, clean, distraction-free workflow Go paperless with PDF Scanner — your pocket document assistant.

About

KD DFU

Features

Read full description

A utility to do the door lock firmware upgrade

Screenshots

PDF Scanner4 screens

KD DFU3 screens

Verdict

The call

The clearest difference is update cadence: PDF Scanner at every 10 days against KD DFU's every 2 months. KD DFU's advantage is iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

PDF Scanner ships an update every 10 days, KD DFU every 2 months. The most recent releases landed on October 21, 2026 and October 12, 2026 respectively.

Scorecard2 real differences · 6 level

PDF Scanner versus KD DFU: the parameters behind the verdict, then further details
Parameter	PDF Scanner	KD DFU
Price	Free	Free
Positive reviews	100.0% of reviews	—
Update frequency	Every 10 days — better	Every 2 months
Ads	No	No
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPod	iPhone, iPod
Requires iOS	15.6	12.0 — better
Further details — not scored
Size	95 MB	26 MB
Age rating	4+	4+
Developer	iDroid App	Guangzhou Kuodao Internet of Things Technology Co., Ltd.

In-app purchases

None

PDF Scanner

No in-app purchases

None

KD DFU

No in-app purchases

Questions

Is PDF Scanner free?

PDF Scanner is free to download, with no in-app purchases.

Is KD DFU free?

KD DFU is free to download, with no in-app purchases.

Do PDF Scanner or KD DFU have ads?

Neither PDF Scanner nor KD DFU shows ads.

Which is updated more often, PDF Scanner or KD DFU?

PDF Scanner ships an update every 10 days, and KD DFU every 2 months. Most recently, PDF Scanner was updated on October 21, 2026 and KD DFU on October 12, 2026.