Comparison

Restriction Enzyme Tool vs PDF File Protector

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

Head to head
About

Restriction Enzyme Tool

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Search for restriction enzymes by name, recognition sequence or overhang. Explore compatible enzymes for double digests quickly, without having to select each individually. - Search over 400 restriction enzymes - View detailed information, including recognition sequence, overhang, incubation temperature and percent activity in Promega buffers - Easily find suitable buffers for double digests

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?Β  PDF File Protector is your professional document security assistant!Β  Safeguard your document security and copyright comprehensively with powerful watermarking, signing, and encryption features. [All-in-One Core Features] β€’ 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. β€’ Secure E-Signature Support for direct handwritten signatures, placed precisely anywhere in the document. Perfect for approving contracts, confirming orders, or signing agreementsβ€”get it done quickly without the hassle of printing and scanning. β€’ 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! β€” 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

Screenshots

Restriction Enzyme Tool4 screens
PDF File Protector3 screens

Verdict

The call

The clearest difference is price: Restriction Enzyme Tool at Free against PDF File Protector's $19.99. Restriction Enzyme Tool also leads on in-app purchases (none vs 1) and iOS requirement (9.0 vs 16.6). PDF File Protector's advantage is update cadence (every 2 months vs every 8 months). On ads and device support 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

Restriction Enzyme Tool is free to download; PDF File Protector costs $19.99 up front. PDF File Protector sells 1 one-off in-app purchase. Restriction Enzyme Tool asks for nothing beyond the download.

UpkeepUpdate frequency

Restriction Enzyme Tool ships an update every 8 months, PDF File Protector every 2 months. The most recent releases landed on October 4, 2026 and September 26, 2026 respectively.

Scorecard4 real differences Β· 2 level
Restriction Enzyme Tool versus PDF File Protector: the parameters behind the verdict, then further details
ParameterRestriction Enzyme ToolPDF File Protector
PriceFree β€” better$19.99
Update frequencyEvery 8 monthsEvery 2 months β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad, iPod β€” betteriPhone, iPad
Requires iOS9.0 β€” better16.6
Further details β€” not scored
Size9 MB7 MB
Age rating4+4+
DeveloperPromega Corporation乐η₯₯ 胑

In-app purchases

None

Restriction Enzyme Tool

No in-app purchases

1 purchases

PDF File Protector

One-time1
  • pdf签名内购$9.99

Questions

Is Restriction Enzyme Tool free?
Restriction Enzyme Tool is free to download, with no in-app purchases.
Is PDF File Protector free?
PDF File Protector costs $19.99, and also offers in-app purchases.
Do Restriction Enzyme Tool or PDF File Protector have ads?
Neither Restriction Enzyme Tool nor PDF File Protector shows ads.
Which is updated more often, Restriction Enzyme Tool or PDF File Protector?
Restriction Enzyme Tool ships an update every 8 months, and PDF File Protector every 2 months. Most recently, Restriction Enzyme Tool was updated on October 4, 2026 and PDF File Protector on September 26, 2026.

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