Comparison

Shadow Security vs Kurir Email

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

Head to head
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/

About

Kurir Email

Features
Read full description

Kurir is a mail app for iPhone and Mac where new senders knock first. It works with the mail account you already have: iCloud, Gmail, Fastmail or any IMAP server. There is no Kurir account and no server to run. THE SCREENER The first time someone writes to you, their mail waits in the Screener. One tap sends the sender to the Imbox, The Feed or Paper Trail. Another blocks them. You decide once per sender, or once for a whole domain, and Kurir remembers. THREE PLACES, NOT ONE PILE The Imbox holds mail from people you approved. The Feed holds the newsletters you chose to keep. Paper Trail holds receipts, bookings and shipping notices, found with search the day you need one. YOUR MAILBOX IS THE SYNC Kurir keeps your screening choices, rules, snoozes and settings in a hidden folder in your own mailbox. Your iPhone and your Mac both read it, so they agree without a server in between. Turn on encryption and that folder is sealed with a passphrase only you know. CALENDAR Connect an iCloud, Google, Fastmail or other CalDAV calendar, or subscribe to an .ics link. Day, week and month views show how many hours are still open, and the next meeting sits on top with a Join button. NEW MAIL RIGHT AWAY Kurir Push keeps checking your mail and pushes new mail to your iPhone. It runs on a Mac with Kurir open, or on a server of your own. Without it, the iPhone checks for new mail when iOS lets it. AND THE REST Reply Later, snooze, follow-ups, send later, pinned threads, Collections, contacts and groups, a list of every attachment, several accounts, and search across all your mail on the device. Images that report when you open a mail stay blocked. AI ON YOUR OWN SUBSCRIPTION Draft generation and AI Rules run on the Claude subscription you connect in Settings. The mail a feature needs goes straight to Anthropic, with no Kurir server in between. PRIVATE No analytics and no tracking. Your mail stays on your device and your mail server. SUBSCRIPTION Kurir is free to download and needs a subscription, yearly or monthly. The yearly plan starts with a free month and the monthly plan with a free week. Payment is charged to your Apple Account. The subscription renews automatically unless you cancel at least 24 hours before the period ends. Manage or cancel it in your Apple Account settings. Terms of Use: https://kurir.io/terms/ Privacy Policy: https://kurir.io/privacy/

Screenshots

Shadow Security4 screens
Kurir Email4 screens

Verdict

The call

The clearest difference is update cadence: Kurir Email at every 3 days against Shadow Security's every 5 months. 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. Shadow Security sells 1 in-app purchase, starting at $0.99 per month and Kurir Email sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Shadow Security ships an update every 5 months, Kurir Email every 3 days. The most recent releases landed on November 9, 2026 and November 10, 2026 respectively.

Scorecard1 real difference · 5 level
Shadow Security versus Kurir Email: the parameters behind the verdict, then further details
ParameterShadow SecurityKurir Email
PriceFreeFree
Update frequencyEvery 5 monthsEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, Mac
Requires iOS18.017.0 — better
Further details — not scored
Size5 MB58 MB
Age rating4+4+
DeveloperStephen LuadzersArvidson Tech AB

In-app purchases

1 purchases

Shadow Security

Subscriptions1
  • Shadow Security Monthly3 Days trial$0.991 Month
2 purchases

Kurir Email

Subscriptions2
  • Kurir, monthly7 Days trial$1.991 Month
  • Kurir, yearly1 Month trial$11.991 Year

Questions

Is Shadow Security free?
Shadow Security is free to download, with in-app purchases available.
Is Kurir Email free?
Kurir Email is free to download, with in-app purchases available.
Do Shadow Security or Kurir Email have ads?
Neither Shadow Security nor Kurir Email shows ads.
Which is updated more often, Shadow Security or Kurir Email?
Shadow Security ships an update every 5 months, and Kurir Email every 3 days. Most recently, Shadow Security was updated on November 9, 2026 and Kurir Email on November 10, 2026.

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