Comparison

SAJ vs LockBox

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

Head to head
About

SAJ

Features
Read full description

Calibration App for SAJ-DMS draft survey. Can only be used by customers with SAJ-DMS system/license.

About

LockBox

Securely encrypt, license, and play videos, images, and PDFs. Protect your digital content with advanced security features and flexible licensing options for creators and businesses.

Highlights
  • Video, image, and PDF encryption
  • Secure playback up to 8K
  • Real-time backend decryption
  • Screen recording protection
  • Flexible licensing management
  • Batch encryption and archiving
  • Membership and e-commerce integration
Features
Read full description

App Description LockBox is a professional platform for digital content encryption, licensing, and secure playback. It is designed for creators, educational institutions, businesses, and digital content publishers. Protect, distribute, authorize, and securely play your videos, images, and PDF files with an all-in-one content protection solution. Secure Playback Experience Supports smooth playback of videos up to 8K resolution. Real-time backend decryption during playback helps protect original content. Supports local files, online files, and cloud storage files. Optimized for large files with fast loading and smooth playback. Professional Encryption Supports video encryption. Supports image encryption. Supports PDF encryption. Supports folder encryption. Supports batch encryption. Package multiple files into a single encrypted archive for easier management and distribution. Advanced Security Protection Provides multiple layers of security to help reduce the risk of unauthorized access, recording, and content distribution. Supports screen recording protection. Supports runtime environment security detection. Supports capture device risk protection. Supports secure backend encryption. Supports license verification. Flexible Licensing Supports category license codes. Supports file license codes. Supports device quantity limits. Supports platform-specific authorization. Supports license expiration settings. Supports WeChat verification. Designed to meet a wide range of digital content distribution and management requirements. Business Features Supports membership management. Supports self-service purchases. Supports e-commerce platform integration. Helps creators and businesses build efficient digital content sales and distribution solutions. Cross-Platform Support Enjoy a consistent and secure experience across multiple platforms. Ideal For Online courses. Corporate training. Digital learning materials. Photography portfolios. Design assets. Business documents. Digital copyright protection. Private file management. Why Choose LockBox Professional digital content protection. High-performance media playback. Flexible licensing management. Comprehensive security protection. Whether you are an independent creator, an educational institution, or an enterprise, LockBox helps you protect, manage, and distribute your digital content more securely and efficiently.

Screenshots

SAJ4 screens
LockBox3 screens

Verdict

The call

The clearest difference is in-app purchases: SAJ at none against LockBox's 3. SAJ also leads on iOS requirement (8.0 vs 15.0). LockBox's advantage is update cadence (weekly vs every 23 months). On price, ads 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. LockBox sells 3 one-off in-app purchases. SAJ asks for nothing beyond the download.

UpkeepUpdate frequency

SAJ ships an update every 23 months, LockBox weekly. The most recent releases landed on October 26, 2026 and October 30, 2026 respectively.

Scorecard3 real differences · 6 level
SAJ versus LockBox: the parameters behind the verdict, then further details
ParameterSAJLockBox
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 23 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS8.0 — better15.0
Further details — not scored
Size152 MB136 MB
Age rating4+4+
DeveloperSAJ Instrument Ab长松 孙

In-app purchases

None

SAJ

No in-app purchases

3 purchases

LockBox

One-time3
  • 1000 coin$1.99
  • 10000 coin$17.99
  • 100000 coin$149.99

Questions

Is SAJ free?
SAJ is free to download, with no in-app purchases.
Is LockBox free?
LockBox is free to download, with in-app purchases available.
Do SAJ or LockBox have ads?
Neither SAJ nor LockBox shows ads.
Which is updated more often, SAJ or LockBox?
SAJ ships an update every 23 months, and LockBox weekly. Most recently, SAJ was updated on October 26, 2026 and LockBox on October 30, 2026.

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