Comparison

Underlayer vs AIscanAuto

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

AIscanAuto

Features
Read full description

Turn your iPhone into a professional car diagnostic tool. AIScanAuto connects to your vehicle's OBD2 port via any Bluetooth or Wi-Fi ELM327 adapter and gives you instant access to fault codes, live engine data, and an AI-powered repair assistant. DIAGNOSE IN SECONDS • Read and clear DTC fault codes (Check Engine, ABS, SRS and more) • Live dashboard: RPM, speed, coolant temp, throttle, battery voltage • Freeze frame data — engine snapshot at the moment of fault AI REPAIR ASSISTANT • Chat with an AI mechanic about your specific fault codes • Get plain-language explanations of what each code means • Receive step-by-step repair recommendations • Works with on-device AI (private, no internet required) or cloud mode SMART CONNECTIVITY • Bluetooth Low Energy (BLE) OBD2 adapters — automatic reconnect • Wi-Fi OBD2 adapters — seamless connection without losing mobile internet • Supports all standard OBD2 protocols (ISO 15765, SAE J1850, ISO 9141) FOR EVERY DRIVER • Metric and imperial units • Works on iPhone and iPad • Available in English, Russian, German, Spanish • No subscription needed for core diagnostics

Screenshots

Underlayer4 screens
AIscanAuto4 screens

Verdict

The call

The clearest difference is in-app purchases: AIscanAuto at none against Underlayer's 1. AIscanAuto also leads on ads (none vs shown) and update cadence (every 5 weeks vs every 5 months). Underlayer's advantage is iOS requirement (15.1 vs 18.0). On price 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. AIscanAuto asks for nothing beyond the download.

UpkeepUpdate frequency

Underlayer ships an update every 5 months, AIscanAuto every 5 weeks. The most recent releases landed on October 16, 2026 and October 12, 2026 respectively.

Scorecard4 real differences Ā· 2 level
Underlayer versus AIscanAuto: the parameters behind the verdict, then further details
ParameterUnderlayerAIscanAuto
PriceFreeFree
Update frequencyEvery 5 monthsEvery 5 weeks — better
AdsYesNo — better
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better18.0
Further details — not scored
Size169 MB32 MB
Age rating4+4+
DeveloperMihail RukavishnikovAlex Valenchits

In-app purchases

1 purchases

Underlayer

Subscriptions1
  • Premium$2.997 Days
None

AIscanAuto

No in-app purchases

Questions

Is Underlayer free?
Underlayer is free to download, with in-app purchases available.
Is AIscanAuto free?
AIscanAuto is free to download, with no in-app purchases.
Do Underlayer or AIscanAuto have ads?
Underlayer shows ads; AIscanAuto does not.
Which is updated more often, Underlayer or AIscanAuto?
Underlayer ships an update every 5 months, and AIscanAuto every 5 weeks. Most recently, Underlayer was updated on October 16, 2026 and AIscanAuto on October 12, 2026.

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