Comparison

PDF File Protector vs PDF Guru Anki

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

Head to head
About

PDF File Protector

Features
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Worried about sensitive PDFs being shared freely or leaked? Want to add a unique identifier to your important documents?  PDF File Protector is your professional document security assistant!  Safeguard your document security and copyright comprehensively with powerful watermarking, signing, and encryption features. [All-in-One Core Features] • Effortless Watermarking Add text or image watermarks with customizable content, size, opacity, and rotation. Stamp exclusive identifiers on contracts, designs, or internal materials to prevent unauthorized use and distribution, asserting your ownership. • Secure E-Signature Support for direct handwritten signatures, placed precisely anywhere in the document. Perfect for approving contracts, confirming orders, or signing agreements—get it done quickly without the hassle of printing and scanning. • Powerful PDF Encryption Set a high-strength password to open the PDF, preventing unauthorized access. Effectively prevents data leaks caused by device loss or accidental file sharing, locking down your privacy and trade secrets. [App Highlights] Simple Operation: No expertise needed. Professional-level protection is just a few taps away. Fully Offline: All processing is done locally on your device. Your files are never uploaded, guaranteeing privacy and security. High-Quality Output: Maintains the original file's clarity and quality without compromising the reading experience. Perfect For: Business Professionals: Protect confidential company reports and contract documents. Designers/Creators: Add copyright watermarks to portfolios and design drafts. General Users: Encrypt important personal documents like IDs, resumes, and bank statements. Download PDF File Protector today! Hold professional-grade security measures in the palm of your hand. Share files with peace of mind! — Privacy Policy please visit: Privacy Policy: https://docs.qq.com/doc/DRFZnV2JkVGVSUWVU Terms of Service: https://docs.qq.com/doc/DREdRb0VqQUFETVhq Apple EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ If you have any questions, feel free to contact us anytime: hxx_shdt@126.com

About

PDF Guru Anki

This app is a multi-functional office and learning assistant. It offers tools for PDF manipulation, efficient Anki card creation from various document types, Anki synchronization, and video note-taking with timestamp integration for a streamlined study process.

Highlights
  • PDF merging, splitting, rotating, encrypting, and converting
  • Anki card creation from PDFs, Word, Xmind, Markdown, Excel, and WeChat Reading
  • Batch creation of cloze, Q&A, and multiple-choice Anki cards
  • Local area network (LAN) sync server for Anki
  • Video note-taking with timestamp and screenshot insertion
  • Timestamp-based navigation for video notes
  • Seamless import of notes into Anki
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PDF Guru Anki is a versatile PDF-centric office and learning toolbox software, currently featuring four main functional modules: 1. **PDF Utility Toolkit**: Includes a wide range of highly practical functions such as merging, splitting, rotating, encrypting, and converting PDFs. 2. **Anki Card Creation Tool**: Supports rapid Anki card creation from various types of materials, including PDFs, Word documents, Xmind mind maps, Canvas notes, Markdown files, Excel spreadsheets, and WeChat Reading highlights. It also enables batch creation of common question types like cloze deletions, Q&A, and multiple-choice questions, effectively addressing the complexity and inefficiency of traditional Anki card creation. This saves users significant time, allowing them to focus more on learning itself. 3. **Anki Power Assistant**: Greatly expands Anki’s peripheral functionalities, including features like building a local area network (LAN) sync server, making your Anki experience more seamless and efficient. 4. **Video Note-Taking Tool**: Supports taking notes while watching videos, allowing users to easily insert video timestamps and screenshots into their notes. It also enables timestamp-based navigation for efficient note review. Notes can be seamlessly imported into Anki using the software’s card creation feature, creating a perfect closed-loop learning process from note-taking and summarization to review and memorization. In short, this software is feature-rich and powerful. Mastering its use can significantly enhance both office productivity and learning efficiency, making it an indispensable tool for anyone seeking to optimize their workflow. **Life is short, I use Guru!**

Screenshots

PDF File Protector3 screens
PDF Guru Anki4 screens

Verdict

The call

The clearest difference is price: PDF Guru Anki at Free against PDF File Protector's $19.99. PDF Guru Anki also leads on update cadence (every 3 weeks vs every 2 months) and iOS requirement (14.0 vs 16.6). On 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

PDF Guru Anki is free to download; PDF File Protector costs $19.99 up front. PDF File Protector sells 1 one-off in-app purchase and PDF Guru Anki sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

PDF File Protector ships an update every 2 months, PDF Guru Anki every 3 weeks. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.

Scorecard3 real differences · 7 level
PDF File Protector versus PDF Guru Anki: the parameters behind the verdict, then further details
ParameterPDF File ProtectorPDF Guru Anki
Price$19.99Free — better
Rating—4.7 (14 ratings) — better
Positive reviews—93.3% of reviews
Number of ratings—14 — better
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.614.0 — better
Further details — not scored
Size7 MB240 MB
Age rating4+4+
Developer乐祥 胡名杰 王

In-app purchases

1 purchases

PDF File Protector

One-time1
  • pdf签名内购$9.99
3 purchases

PDF Guru Anki

Subscriptions2
  • Monthly membership3 Days trial$0.991 Month
  • Annual membership3 Days trial$6.991 Year
One-time1
  • Lifetime Membership$14.99

Questions

Is PDF File Protector free?
PDF File Protector costs $19.99, and also offers in-app purchases.
Is PDF Guru Anki free?
PDF Guru Anki is free to download, with in-app purchases available.
Do PDF File Protector or PDF Guru Anki have ads?
Neither PDF File Protector nor PDF Guru Anki shows ads.
Which is updated more often, PDF File Protector or PDF Guru Anki?
PDF File Protector ships an update every 2 months, and PDF Guru Anki every 3 weeks. Most recently, PDF File Protector was updated on October 12, 2026 and PDF Guru Anki on October 13, 2026.

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