Comparison

Unit Convert Master vs Gallery Lock Crypto Encrypted

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

Head to head
About

Unit Convert Master

Easily convert between over 100 measurement units across 15 categories. This app offers a user-friendly interface, offline functionality, and a history of your conversions for quick access. Ideal for students, professionals, and everyday users needing precise calculations.

Highlights
  • 15+ conversion categories
  • 100+ measurement units
  • Intuitive interface with themes
  • Custom keyboard for input
  • Conversion history with search
  • Offline functionality
Features
Read full description

Transform complex unit conversions into simple tasks with our comprehensive Unit Converter app. Whether you're a student, professional, scientist, engineer, traveler, or home cook, this app has you covered with precise conversions across multiple categories. FEATURES: - 15+ conversion categories including Length, Mass, Temperature, Time, Volume, Area, Speed, Energy, Pressure, Angle, Data Size, Power, Frequency, Radiation, Fuel Economy, and Cooking - 100+ measurement units from common everyday measures to specialized scientific units - Beautiful, intuitive interface with customizable themes - Custom keyboard for easy and accurate input - Swap button to quickly reverse conversion direction - Comprehensive conversion history with search functionality - Copy results with a single tap - Works offline - no internet required CONVERSION CATEGORIES: - Length: meters, feet, inches, miles, light years, and more - Mass: kilograms, pounds, ounces, tons, and specialized units - Temperature: Celsius, Fahrenheit, Kelvin - Time: seconds to years and everything in between - Volume: liters, gallons, cubic meters, and cooking measurements - Area: square meters, acres, square feet, even Japanese tatami - Speed: mph, km/h, m/s, knots, speed of light, and sound - Energy: joules, calories, kilowatt-hours, BTU - Pressure: pascals, bars, psi, atmospheres - Angle: degrees, radians, minutes of arc - Data: bytes, kilobytes up to petabytes - Power: watts, horsepower, BTU/hour - Frequency: hertz, rpm, cycles per second - Radiation: becquerels, curies, grays, rads - Fuel Economy: mpg, km/L, L/100km - Cooking: all essential kitchen measurements

About

Gallery Lock Crypto Encrypted

Features
Read full description

Crypto Gallery is the calm private photo vault and video vault that hides your personal pictures and videos behind Face ID and a strong passcode. This secret gallery app keeps every photo and every video encrypted on your iPhone using AES 256 GCM so only you can open the vault. No cloud. No account. No server. No tracking. No ads. Crypto Gallery is an offline encrypted gallery for iPhone and iPad. Use it as a hidden photo vault, a private video locker, a secret picture album, a passcode protected image safe, a Face ID locked gallery, and a private diary for memories you do not want anyone else to see. KEY FEATURES Private photo vault and private video vault. Import photos and videos from your camera roll and store them inside an encrypted sandbox on device. Face ID and Touch ID unlock. Open your private gallery with one look or one touch. Fall back to a six to eight digit passcode you choose yourself. AES 256 GCM encryption. Every file is encrypted with industry standard authenticated encryption before it reaches the disk. Per item data key. Every picture and video has its own unique key sealed inside your master vault key so a single exposed file cannot break the rest of the gallery. Secure Enclave support. On supported iPhones Face ID unlock is backed by the Secure Enclave hardware key store. Offline only. No account. No login. No registration. No cloud sync. No iCloud upload. No telemetry. No analytics. No advertising network. The app works completely offline. Auto lock. The vault locks immediately when you switch apps or put the iPhone to sleep, so a quick glance never exposes your private pictures. Background privacy cover. When you return to the app switcher Crypto Gallery shows a privacy mask instead of a screenshot of your gallery. Import from Photos. The system picker lets you choose many photos and videos at once. You can optionally remove the originals from the camera roll after a confirmed import so sensitive media lives only inside the vault. Bulk selection. Favorite, delete, or export many items in one gesture. Safe export. Share selected items back to Photos, Files, AirDrop, or any app, only when you decide. Dense date grouping. The encrypted photo gallery groups items by Today, Yesterday, weekday, month, and year, the same calm rhythm that Apple Photos uses. Pinch to change density. Zoom the grid from two to five columns with a natural pinch gesture, just like a native Photos app. Premium calm design. SwiftUI native, light mode and dark mode, thoughtful haptics, reduce motion support, VoiceOver ready. HONEST SECURITY ARCHITECTURE A master encryption key is generated on first launch and wrapped with a key derived from your passcode using PBKDF2 HMAC SHA 256 with three hundred ten thousand iterations. When you enable Face ID the same master key is also wrapped with a Secure Enclave backed key so biometric unlock is fast and hardware protected. Each photo and each video carries its own per item data key that is sealed under the master key. Thumbnails are encrypted. The vault index is encrypted. Temporary files created during import, export, and playback are removed when the related view closes. All vault files live in the app sandbox, are marked as excluded from iCloud backup, and carry the complete unless open data protection class. When you delete the app, the iOS sandbox and the associated keychain items are removed with it. If you forget your passcode and did not export your media, the content cannot be recovered. We choose to be honest about this rather than promise magic. COMPATIBILITY Works on iPhone and iPad running iOS 17 and later. Universal design scales up to tablets with proper column counts. Supports Dynamic Type, VoiceOver, and Reduce Motion. Crypto Gallery is the simple private encrypted photo and video vault you actually keep on your home screen. A calm hidden gallery for private pictures. A secure video locker for family videos. A safe picture album for personal memories.

Screenshots

Unit Convert Master2 screens
Gallery Lock Crypto Encrypted3 screens

Verdict

The call

The clearest difference is ads: Gallery Lock Crypto Encrypted at none against Unit Convert Master's shown. Gallery Lock Crypto Encrypted also leads on update cadence (every 3 days vs every 4 months). On price, in-app purchases, 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Unit Convert Master ships an update every 4 months, Gallery Lock Crypto Encrypted every 3 days. The most recent releases landed on September 13, 2026 and September 9, 2026 respectively.

Scorecard2 real differences · 7 level
Unit Convert Master versus Gallery Lock Crypto Encrypted: the parameters behind the verdict, then further details
ParameterUnit Convert MasterGallery Lock Crypto Encrypted
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 4 monthsEvery 3 days — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.217.0 — better
Further details — not scored
Size4 MB11 MB
Age rating4+4+
DeveloperMizuki HoshidaPDF SCANNER LLC

In-app purchases

None

Unit Convert Master

No in-app purchases

None

Gallery Lock Crypto Encrypted

No in-app purchases

Questions

Is Unit Convert Master free?
Unit Convert Master is free to download, with no in-app purchases.
Is Gallery Lock Crypto Encrypted free?
Gallery Lock Crypto Encrypted is free to download, with no in-app purchases.
Do Unit Convert Master or Gallery Lock Crypto Encrypted have ads?
Unit Convert Master shows ads; Gallery Lock Crypto Encrypted does not.
Which is updated more often, Unit Convert Master or Gallery Lock Crypto Encrypted?
Unit Convert Master ships an update every 4 months, and Gallery Lock Crypto Encrypted every 3 days. Most recently, Unit Convert Master was updated on September 13, 2026 and Gallery Lock Crypto Encrypted on September 9, 2026.

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