Comparison

Flex Calculators vs Calculator Plug

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

Head to head
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.

About

Calculator Plug

Access over 450 specialized calculators for construction, finance, health, trades, and more. This app offers a clean, offline-capable interface for quick, accurate calculations without intrusive ads.

Highlights
  • 450+ searchable calculators
  • Offline functionality
  • Clean dark interface
  • Construction calculators
  • Finance calculators
  • Health and fitness calculators
  • Trades calculators
Features
Read full description

Calculator Plug puts 450+ real-world calculators in one fast, clean app - built for people who need a real answer, not a search engine full of pop-ups. CATEGORIES - Construction and home: concrete, drywall, flooring, roofing, framing, square footage - Finance and money: mortgage, loan, refinance, compound interest, ROI, retirement - Health and fitness: BMI, calories, macros, body fat, heart rate, pace - Math and science: algebra, geometry, statistics, chemistry, physics - Trades: electrical, plumbing, HVAC, welding, structural engineering - Trading and investing: position size, pip value, cost basis, capital gains - Conversions, automotive, business, date and time, and more - Field pack: local weather, tides, sunrise/sunset and moon times FEATURES - 450+ calculators, searchable in a tap - Works offline (except live weather and tides) - Pro unlocks every calculator; Pro+ adds the professional suite - Clean dark interface, no clutter Free to use with a core set. Pro and Pro+ unlock the full library. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Flex Calculators4 screens
Calculator Plug4 screens

Verdict

The call

The clearest difference is update cadence: Calculator Plug at every 4 days against Flex Calculators's every 10 days. 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

Both are free to download. Flex Calculators sells 1 one-off in-app purchase and Calculator Plug sells 4 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Flex Calculators ships an update every 10 days, Calculator Plug every 4 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 8 level
Flex Calculators versus Calculator Plug: the parameters behind the verdict, then further details
ParameterFlex CalculatorsCalculator Plug
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 10 daysEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.1
Further details — not scored
Size37 MB34 MB
Age rating4+4+
DeveloperAn LeMark Gabrielli

In-app purchases

1 purchases

Flex Calculators

One-time1
  • Remove Ads$4.99
4 purchases

Calculator Plug

Subscriptions2
  • Pro Monthly$5.991 Month
  • Pro+ Monthly$9.991 Month
One-time2
  • Pro Lifetime$29.99
  • Pro+ Lifetime$44.99

Questions

Is Flex Calculators free?
Flex Calculators is free to download, with in-app purchases available.
Is Calculator Plug free?
Calculator Plug is free to download, with in-app purchases available.
Do Flex Calculators or Calculator Plug have ads?
Neither Flex Calculators nor Calculator Plug shows ads.
Which is updated more often, Flex Calculators or Calculator Plug?
Flex Calculators ships an update every 10 days, and Calculator Plug every 4 days. Most recently, Flex Calculators was updated on October 24, 2026 and Calculator Plug on October 31, 2026.

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