Comparison

Converter and Calculator vs Krypton

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

Head to head
About

Converter and Calculator

This app functions as a unit and currency converter, offering over 500 units across 29 categories. It features a full-screen calculator with memory functions and allows for extensive customization of displayed units and their order.

Highlights
  • Unit and currency conversion
  • Full-screen calculator
  • Customizable units and categories
  • In-line calculations
  • Convert multiple units simultaneously
  • Automatic regional formatting
Features
Read full description

A calculator & unit & currency converter with a super clean interface, standalone calculator, customizable color, and over 500 units in 29 categories (161 currencies). Display only the units and categories you want and put them in any order. Fast, Easy To Use: Pick a category, pick a unit, and then enter an amount. All other units are instantly converted to your selected unit as you enter amount. Features: • Full screen calculator with memory functions quickly accessible from bottom toolbar • Customizable color • Customizable units (display only the units & categories you want in whatever order you want) • In-line calculations while converting (fractions, decimals, add, subtract, multiply, divide). • Convert multiple units / currencies at once • Both unit names and symbols shown. • Results with up to 12 significant digits. • Automatic formatting of decimal and thousands separators according to your Region. • Automatic formatting of extremely large or small numbers with scientific E notation. Options: - Font Size - Sound - Color Theme - Minimum Decimal Digits (0-12) - Maximum Decimal Digits (0-12) - Show Thousands Separators - E Notation (Off, Auto, Scientific, Engineering) - Equals Repeat - Replace ÷ Button With / - Replace E Button With Hidden, EE, 00, 000 - Show Memory Buttons - Memory Store (Result, Last Input Number) - Currency Updates - Symbol First - In-Line Definitions - UK Spelling 501 Units In 29 Categories: • Acceleration • Angle • Area • Blood Cholesterol • Blood Glucose • Capacitance • Currency • Data • Density • Dynamic Viscosity • Electric Charge • Electric Current • Electric Potential • Electrical Conductance • Electrical Resistance • Energy • Force • Frequency • Fuel Economy • Length • Mass • Power • Pressure • Speed • Temperature • Time • Torque • Volume • Weight (Mass) URL Scheme: converterpro://

About

Krypton

Securely encrypt and protect your personal documents and folders with strong encryption. This app acts like a digital vault, keeping your sensitive files safe from unauthorized access on your devices and cloud storage.

Highlights
  • Strong encryption for documents and folders
  • Acts as a secure digital vault
  • Supports various file types (pictures, movies, PDFs, etc.)
  • Cloud synchronization with iCloud Drive and Dropbox
  • Available on iOS and macOS
Features
Read full description

Protecting your personal and confidential information since 2009, Krypton is the first, simplest and most reliable App on the iOS Store to strongly encrypt entire documents and folders. Now also available on the macOS App Store. Your stuff is secure from prying eyes no matter where you are in the world. Metaphorically, Krypton keeps your encrypted items in a special vault, with each item contained in their own deposit box; to gain access to an encrypted item the vault must be open and the passcode key must be used to unlock the deposit box before you can discern the plaintext contents inside. In iOS the vault may be open or closed, while on macOS the vault opens upon Log In. Because the unit of encryption is an entire document or folder, Krypton is not a password manager in the traditional sense, although you can maintain a document of all your passwords that you encrypt between uses. Krypton can encrypt any type of document, including but not limited to: • Pictures and movies from your photo album. • Email messages from your mailbox. • Songs, PDFs, movies, Zip files, word processing documents, text files, images, program source code or any other object that you can download over the network or from your personal web server. • Anything on the iOS pasteboard. • Any document other Apps are willing to Share, such as Pages, Numbers and Keynote. • iCloud Drive and Dropbox files for easy cloud synchronization. Krypton uses strong encryption on each item. This has several ramifications: • If your passcode is strong enough to withstand a brute force attack, no one is going to see your stuff. • If you forget your passcode, no one can recover your stuff for you! But only that one document is lost, not your entire collection of items. • Your stuff is secure even if your iDevice or Mac is stolen, or iCloud Drive or Dropbox account is compromised. Visit http://www.bigcatos.com to learn more.

Screenshots

Converter and Calculator4 screens
Krypton4 screens

Verdict

The call

The clearest difference is monetization model: Converter and Calculator at free against Krypton's paid. Converter and Calculator also leads on update cadence (every 2 weeks vs every 10 months) and ratings volume (268 vs 2). Krypton's advantage is rating (5.0 vs 4.7). 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

Converter and Calculator costs $2.99 and Krypton $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Krypton holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Converter and Calculator has 268 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Converter and Calculator ships an update every 2 weeks, Krypton every 10 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 6 level
Converter and Calculator versus Krypton: the parameters behind the verdict, then further details
ParameterConverter and CalculatorKrypton
Price$2.99$2.99
Rating4.7 (268 ratings)5.0 (2 ratings) — better
Positive reviews90.2% of reviews—
Number of ratings268 — better2
Update frequencyEvery 2 weeks — betterEvery 10 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS13.0 — better14.0
Further details — not scored
Size9 MB110 MB
Age rating4+4+
DeveloperCider Software LLCSteve Lidie

Customer experience

Converter and Calculator

All ratings267 ratings
Positive95.1%
Neutral2.2%
Negative2.6%
Written reviews41 reviews
Positive90.2%
Neutral7.3%
Negative2.4%

Krypton

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Converter and Calculator

Reported bugs

3 issues
  • App not updating calculations daily
  • Conversion table setup is off by one line
  • No Copy/Paste functionality

Requested features

4 requests
  • Support today's widget
  • Add Vietnamese language
  • Create custom units
  • Add a search bar

Krypton

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Converter and Calculator

No in-app purchases

None

Krypton

No in-app purchases

Questions

Is Converter and Calculator free?
Converter and Calculator costs $2.99, with no in-app purchases.
Is Krypton free?
Krypton costs $2.99, with no in-app purchases.
Which has better reviews, Converter and Calculator or Krypton?
Krypton is rated higher. Converter and Calculator averages 4.7 out of 5 from 268 ratings, while Krypton averages 5.0 from 2 ratings.
Do Converter and Calculator or Krypton have ads?
Neither Converter and Calculator nor Krypton shows ads.
Which is updated more often, Converter and Calculator or Krypton?
Converter and Calculator ships an update every 2 weeks, and Krypton every 10 months. Most recently, Converter and Calculator was updated on November 1, 2026 and Krypton on November 3, 2026.

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