Comparison

Underlayer vs EML Forensic Viewer

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

Head to head
About

Underlayer

Features
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UNDERLAYER - STEGANOGRAPHY MADE SIMPLE Transform ordinary images into secret carriers. Hide confidential messages invisibly within photos and share them through any messenger without raising suspicion. KEY FEATURES: HIDE SECRETS • Embed text messages invisibly into any image • Two encoding modes: Hidden (invisible pixels) and Open (colored frame) • Open mode survives messenger compression (Telegram, WhatsApp, etc.) • Share processed images directly or save to gallery REVEAL MESSAGES • Extract hidden text from steganographic images • Automatic detection of encoding method • Works with images received through messengers • Share intent support - open images directly from gallery WHY UNDERLAYER? • Simple & Intuitive - No cryptography knowledge required • Messenger-Friendly - Open mode designed for compressed sharing • Privacy First - All processing happens locally on your device • Universal - Works with JPG, PNG, WebP formats • No Account Required - Start using immediately USE CASES • Private communication through public channels • Watermarking images with hidden ownership data • Secure note-taking in plain sight • Educational tool for learning steganography • Fun way to send secret messages to friends SECURITY & PRIVACY • No internet connection required for processing • Your messages never leave your device • No data collection or tracking • Complete control over your secrets PREMIUM FEATURES • No banner ads at the bottom • No interstitial ad interruptions • Process unlimited images without ad breaks HOW IT WORKS 1. Select any image from your gallery 2. Enter your secret message 3. Choose encoding mode (Hidden or Open) 4. App embeds message into image pixels 5. Share through messengers or save locally 6. Recipient opens image in Underlayer to reveal message ENCODING MODES EXPLAINED HIDDEN MODE • Message embedded invisibly in image pixels • Completely undetectable to human eye • Best for uncompressed image sharing • Lost when image is compressed by messengers OPEN MODE • Message encoded as colored frame border • Visible as decorative edge around image • Survives Telegram, WhatsApp compression • Recommended for messenger sharing INTERNATIONAL • Available in English and Russian • More languages coming soon • Automatic language detection Whether you're a privacy enthusiast, security professional, or just curious about steganography - Underlayer makes it accessible to everyone. Download now and start hiding your secrets in plain sight! Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

EML Forensic Viewer

Analyze EML files with this powerful forensic tool. Inspect email headers, metadata, attachments, and content locally for investigations and security analysis. Supports offline processing for maximum privacy.

Highlights
  • EML file opener
  • Email header viewer
  • Metadata extraction
  • Attachment analyzer
  • Offline analysis
  • SPF, DKIM, DMARC checker
Features
Read full description

EML Forensic Viewer - Professional Email Analyzer & Investigation Tool The ultimate EML file viewer and email forensics tool for iPhone and iPad. Open EML files instantly and analyze email headers, metadata, attachments, and message content with powerful forensic analysis capabilities. Perfect for email investigation, phishing detection, digital forensics, and secure email inspection. COMPREHENSIVE EML FILE ANALYSIS View EML files with complete email header inspection and metadata extraction. Our email viewer displays all technical details including sender information, recipient data, timestamps, message routing, and authentication records. Analyze MIME headers, content types, and email structure. • EML file opener with instant parsing • Email header viewer and analyzer • Complete metadata extraction tool • MIME message inspector • Email content viewer (HTML and text) • Attachment analyzer and extractor • Message body decoder DIGITAL FORENSICS & EMAIL INVESTIGATION Professional email forensics tool designed for security analysts, IT professionals, investigators, and cybersecurity experts. Examine suspicious emails, investigate phishing attempts, analyze email authentication, and extract digital evidence. • Email authentication checker (SPF, DKIM, DMARC) • Email investigator • Email source code viewer • Message tracking analysis POWERFUL EMAIL HEADER ANALYSIS Deep dive into email headers with our advanced header viewer. Inspect Message-ID, Received paths, Return-Path, authentication results, spam scores, and routing information. Essential for email troubleshooting, deliverability analysis, and security investigations. • Message-ID extraction • Received header analysis • Email routing tracker • Authentication result viewer • Spam score analysis • Mail server investigation • Email delivery path analyzer ATTACHMENT FORENSICS & FILE ANALYSIS Examine email attachments with detailed file information including names, types, sizes, and metadata. Perfect for malware analysis preparation, suspicious attachment investigation, and forensic evidence collection. • Attachment file viewer • File type identifier • File size analyzer • Attachment metadata extractor • Embedded content inspector • Inline image viewer • Multi-part message analyzer SECURE OFFLINE EMAIL ANALYSIS 100% privacy-focused email viewer with complete offline processing. No cloud uploads, no external servers, no data collection. All EML file analysis happens locally on your device for maximum security and confidentiality. • Offline EML viewer • Private email inspector • Secure file processing • No internet required • Local-only analysis • Privacy-first forensics EMAIL CONTENT RENDERING View email messages in original HTML format or plain text. Toggle between rendered HTML view and raw text content. Perfect for analyzing email formatting, embedded scripts, tracking pixels, and hidden content. • HTML email renderer • Plain text viewer • Email source viewer • Content format switcher • Hidden content detector • Embedded code analyzer FILE FORMAT SUPPORT • Standard .eml email files • RFC 822 message format • MIME multipart messages • Base64 encoded content • Quoted-printable encoding • International character sets (UTF-8, ISO-8859) • Embedded attachments and inline images • HTML and plain text content ADVANCED FEATURES Email Parser - Sophisticated EML parsing engine handles complex message formats, nested attachments, and multi-part content structures Metadata Viewer - Complete metadata display including all headers, MIME parts, encoding information, and message architecture Quick Analysis - Instant file loading and parsing for rapid email investigation and forensic analysis workflows Download EML Forensic Viewer - the professional email analysis and forensics tool trusted by security professionals worldwide. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Underlayer4 screens
EML Forensic Viewer4 screens

Verdict

The call

The clearest difference is ads: EML Forensic Viewer at none against Underlayer's shown. EML Forensic Viewer also leads on update cadence (every 2 weeks vs every 5 months) and iOS requirement (13.0 vs 15.1). On price, in-app purchases and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Underlayer sells 1 in-app purchase, starting at $2.99 per 7 days and EML Forensic Viewer sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Underlayer ships an update every 5 months, EML Forensic Viewer every 2 weeks. The most recent releases landed on September 12, 2026 and September 13, 2026 respectively.

Scorecard3 real differences Ā· 5 level
Underlayer versus EML Forensic Viewer: the parameters behind the verdict, then further details
ParameterUnderlayerEML Forensic Viewer
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyEvery 5 monthsEvery 2 weeks — better
AdsYesNo — better
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.113.0 — better
Further details — not scored
Size169 MB120 MB
Age rating4+4+
DeveloperMihail RukavishnikovPleme PTY LTD.

In-app purchases

1 purchases

Underlayer

Subscriptions1
  • Premium$2.997 Days
3 purchases

EML Forensic Viewer

Subscriptions2
  • EML Forensic Viewer Pro Monthly7 Days trial$2.991 Month
  • EML Forensic Viewer Pro Annual$29.991 Year
One-time1
  • EML Lifetime Pro Access$39.99

Questions

Is Underlayer free?
Underlayer is free to download, with in-app purchases available.
Is EML Forensic Viewer free?
EML Forensic Viewer is free to download, with in-app purchases available.
Do Underlayer or EML Forensic Viewer have ads?
Underlayer shows ads; EML Forensic Viewer does not.
Which is updated more often, Underlayer or EML Forensic Viewer?
Underlayer ships an update every 5 months, and EML Forensic Viewer every 2 weeks. Most recently, Underlayer was updated on September 12, 2026 and EML Forensic Viewer on September 13, 2026.

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