Comparison

Calculator vs Flex Calculators

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

Head to head
About

Calculator

Features
Read full description

Are you constantly re-entering complex, repetitive calculations? "Calculator - Number Block" goes beyond simple calculations. It's a new concept calculator designed to save and freely combine frequently used formulas. Key Features Number Block System Frequently used formulas and results can be saved in a single block. Touching a block, organized like a puzzle piece, allows you to instantly recall previous calculations. Combining multiple blocks reduces repetitive input and improves calculation efficiency. Customized Calculation Modes for Different Situations A single app provides a variety of calculation functions essential for everyday life. Basic Calculator: Intuitive operation and a clean interface Exchange Rate Calculation: Global currency conversion based on real-time exchange rates Discount Rate Calculation: Check the list price, discount rate, and final price at a glance Cost-effective Calculation: Compare price and capacity to help you make informed choices Unit Conversion: Quickly convert between various units, including length, area, weight, and temperature Intuitive and Sophisticated Design Supports dark mode and uses color themes for each calculation mode for visual distinction and ease of use. A more convenient calculation experience is provided through a screen layout tailored to your preferences. Secure History Management All calculation records are automatically saved, allowing you to review and reuse previous records at any time. This simplifies repetitive calculations for work and study. No more repetitive input of the same formulas. Start a faster, smarter calculation experience with 'Calculator - Number Block.'

About

Flex Calculators

Features
Read full description

Flex Calculators is a powerful all-in-one calculator app built for everyday problems and advanced math. Use it as your daily calculator, then switch to specialized tools for equations, calculus, statistics, finance, time, and conversions. Key features: - Scientific calculator - Fast expression input and real-time result preview - History support for quick reuse - Configurable angle mode (degrees/radians) - Real-only or complex result handling - Advanced math tools - Equation solver - System of equations and system of inequalities - Matrix calculator - Vector calculator - Derivatives and integrals - Statistics and distributions - Value table and proportion tools - Number base converter - Unit converter - Convert across many categories including: length, mass, area, volume, temperature, time, speed, force, pressure, energy, power, electrical, light, sound, data, performance, chemistry, and biology - Daily life calculators - Currency converter - Energy/fuel cost calculator - BMI/body index calculator - Loan payment calculator - Savings calculator - Date calculator - World hour/time-zone tool - Personalization and display controls - Light, dark, or system theme - Custom theme color - Multi-language interface - Decimal precision setting - Number formatting options (including thousand separators) - Ads and purchase - Banner/interstitial ads may be shown - One-time purchase option to remove ads Why users choose Flex Calculators: - One app for both basic and advanced calculations - Clean workflow for study, engineering, and daily finance tasks - Practical tools that reduce the need to install multiple calculator apps Whether you need quick arithmetic, equation solving, conversions, or planning daily expenses, Flex Calculators helps you solve it faster.

Screenshots

Calculator4 screens
Flex Calculators4 screens

Verdict

The call

The clearest difference is iOS requirement: Calculator at 13.0 against Flex Calculators's 15.1. On price, update cadence, ads and in-app purchases there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Calculator sells 1 one-off in-app purchase and Flex Calculators sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Calculator ships an update every 8 days, Flex Calculators every 10 days. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.

Scorecard1 real difference ยท 5 level
Calculator versus Flex Calculators: the parameters behind the verdict, then further details
ParameterCalculatorFlex Calculators
PriceFreeFree
Update frequencyEvery 8 days โ€” betterEvery 10 days
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPodiPhone, iPad, iPod โ€” better
Requires iOS13.0 โ€” better15.1
Further details โ€” not scored
Size25 MB37 MB
Age rating4+4+
Developerjongku hanAn Le

In-app purchases

1 purchases

Calculator

One-time1
  • Remove Ads$0.99
1 purchases

Flex Calculators

One-time1
  • Remove Ads$4.99

Questions

Is Calculator free?
Calculator is free to download, with in-app purchases available.
Is Flex Calculators free?
Flex Calculators is free to download, with in-app purchases available.
Do Calculator or Flex Calculators have ads?
Neither Calculator nor Flex Calculators shows ads.
Which is updated more often, Calculator or Flex Calculators?
Calculator ships an update every 8 days, and Flex Calculators every 10 days. Most recently, Calculator was updated on November 9, 2026 and Flex Calculators on November 5, 2026.

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