Comparison

Flash Checklist vs Shadow Security

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

Head to head
About

Flash Checklist

Easily create and print your checklists directly from your mobile device. This app focuses on the simple task of transforming your digital lists into printable formats.

Highlights
  • Create checklists
  • Print checklists
  • Mobile list creation
  • Printable formats
Features
Read full description

Flash is a lightweight checklist app designed for creating, organizing, previewing, and printing lists. Use it for travel packing, shopping, work tasks, or everyday reminders. Key features: • Create and manage multiple checklists • Add several items at once • Edit, delete, and reorder items • Preview lists before printing • Print with AirPrint • Optional iCloud sync • Local-first editing that works offline Flash 2.0 has been rebuilt with SwiftUI and adds clearer privacy controls. Optional product analytics is off by default. It starts only after your explicit consent, and you can turn it off or delete previously shared data at any time in Settings.

About

Shadow Security

Features
Read full description

PROTECT YOUR DOCUMENTS FROM AI ATTACKS Shadow Security is the first PDF security app with AI-powered threat detection. Scan documents for prompt injection, data exfiltration, malware, and 160+ other sophisticated attacks. ENTERPRISE-GRADE SECURITY FOR EVERYONE • 160+ Threat Detection Patterns across 30 categories • AI Attack Protection (prompt injection, jailbreaks) • Malware & Virus Detection • Hidden Text Detection (steganography) • Data Exfiltration Prevention • SQL Injection & XSS Detection • Command Injection Protection • And much more... PROFESSIONAL PDF TOOLS INCLUDED • Full-featured PDF viewer with smooth scrolling • Annotations: highlights, notes, drawings, signatures • Form filling and editing • OCR text extraction • Page management and organization • Export to multiple formats • Print with advanced options 100% PRIVATE & SECURE • All scanning happens on YOUR device • No cloud uploads or data collection • No internet connection required • Your documents never leave your device • AES-256 encryption for sensitive data • GDPR, HIPAA, CCPA compliant CLEAN FILE EXPORT • Remove all detected threats automatically • Scrub metadata and EXIF data • Export sanitized versions of documents • Verify clean files with re-scanning • Batch cleaning for multiple files COMPLIANCE TRACKING • GDPR compliance monitoring • HIPAA compliance features • SOC2 compliance tracking • PCI-DSS compliance support • Audit logging and reporting • Enterprise-ready compliance tools ADVANCED FEATURES • Batch scanning for multiple files • Scheduled automatic scans • Folder watching and monitoring • Detailed threat reports (PDF, JSON, CSV) • Threat severity classification • Real-time security dashboard • AI-powered threat intelligence MULTI-PLATFORM • Native macOS app (Apple Silicon + Intel) • Native iOS app (iPhone + iPad) • iCloud sync across devices • Handoff support • Universal purchase PERFECT FOR • Business professionals handling sensitive documents • Healthcare providers (HIPAA compliance) • Legal professionals • Financial services • Government agencies • Privacy-conscious individuals • Anyone who values document security WHY SHADOW SECURITY? In an era of AI-powered attacks, traditional security tools aren't enough. Shadow Security uses advanced algorithms to detect sophisticated threats that other apps miss: • Prompt injection attacks that manipulate AI systems • Jailbreak techniques that bypass security controls • Hidden malicious code in seemingly innocent documents • Data exfiltration attempts • Social engineering attacks • And 155+ other threat patterns TRUSTED BY PROFESSIONALS Shadow Security is built by security experts and trusted by professionals worldwide. Our threat detection algorithms are constantly updated to protect against the latest attacks. EASY TO USE Despite its advanced capabilities, Shadow Security is incredibly easy to use: 1. Open any PDF, Word doc, or image 2. Tap "Scan for Threats" 3. Review detailed results 4. Export clean version if needed TERMS OF USE https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Flash Checklist3 screens
Shadow Security4 screens

Verdict

The call

The clearest difference is in-app purchases: Flash Checklist at none against Shadow Security's 1. Shadow Security's advantage is update cadence (every 5 months vs every 24 months). On price, ads, device support and iOS requirement 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. Shadow Security sells 1 in-app purchase, starting at $0.99 per month. Flash Checklist asks for nothing beyond the download.

UpkeepUpdate frequency

Flash Checklist ships an update every 24 months, Shadow Security every 5 months. The most recent releases landed on September 19, 2026 and October 12, 2026 respectively.

Scorecard2 real differences · 8 level
Flash Checklist versus Shadow Security: the parameters behind the verdict, then further details
ParameterFlash ChecklistShadow Security
PriceFreeFree
Rating3.7 (9 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings9 — better—
Update frequencyEvery 24 monthsEvery 5 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better18.0
Further details — not scored
Size3 MB5 MB
Age rating4+4+
Developer传毅 苏Stephen Luadzers

In-app purchases

None

Flash Checklist

No in-app purchases

1 purchases

Shadow Security

Subscriptions1
  • Shadow Security Monthly3 Days trial$0.991 Month

Questions

Is Flash Checklist free?
Flash Checklist is free to download, with no in-app purchases.
Is Shadow Security free?
Shadow Security is free to download, with in-app purchases available.
Do Flash Checklist or Shadow Security have ads?
Neither Flash Checklist nor Shadow Security shows ads.
Which is updated more often, Flash Checklist or Shadow Security?
Flash Checklist ships an update every 24 months, and Shadow Security every 5 months. Most recently, Flash Checklist was updated on September 19, 2026 and Shadow Security on October 12, 2026.

Other comparisons