Comparison

Calcularium vs Calculator´

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

Head to head
About

Calcularium

This app offers real-time calculations, allowing you to see results as you type. It goes beyond basic arithmetic with advanced functions, unit conversions, and customizable expressions, acting as a powerful helper for complex calculations.

Highlights
  • Reactive Calculations
  • Voice Control (Siri)
  • Script and Photo Input
  • Multi-Level Sub-Calculations
  • Editable History
  • Unit and Currency Conversion
  • Customizable Functions
Features
Read full description

Here are Calcularium users describing the app: "You know how you're slowly calculating something and you're in the middle of an expression so you want to know how you're doing? Yeah well that's real time calculation and I couldn't find an app that did it right, tried dozens of them and still nothing, BUT this app does it the perfect way, actually the way it should work, this app is definitely worth it, thanks a lot devs, big love. Edit: OMG this is better than I thought, I just noticed the tutorials given and this app has more functions than I noticed, this is super amazing, devs, you're the best." – Anton31kah10 "I mean it literally. The tiny app packs impressive amount of useful stuff for a mere calculator. I would say it’s like mobile Excel. Math functions, unit conversion, currency exchange rates, and, even simple programmers functions. I wrote a small formula to calculate tips for our county. Easier and better than any tipping app! I hope the developer expands these functions for Shortcuts and Siri. This would be real killer app! Thanks guys!" – Z!KeepeR "What looks like just a clean calculator app is in fact a powerhouse full of advanced features you could only get with custom Excel mega sheet." – AlexDbk "You can find a lot of different kind of calculators but this is something completely new and awesome. It is not an another boring calculator. This is your real helper if you need to calculate something more than 2+2 :). Tutorial is great and helpful. History, customizable functions, variables, converter and much more. Great! It is definitely the next generation of the regular things." – Lysyk CALCULARIUM FEATURES: • Voice-controlled, backed by Siri • Script and Photo input modes • Reactive Calculations • Multi-Level Sub-Calculations with No Limits • History: Editable and Reusable • Self-Explanatory Naming for Every Component • Functions and Reusable Expressions • Constants and Reusable Numbers • Multiple Reversible Conversions (350+ units and 160+ currencies) • Advanced Search • Built-In Scientific Functions CONTROL BY VOICE Calcularium is also can be controlled by voice and has the ability to understand spoken math questions and calculate the answer. Tell it: "6 bottles by 15 dollars” - and it will give you the right result! It works by using verbal numbers and mathematical operations. FLUID DESIGN The design language of the Calcularium is based on tokens. All tokens are of the same structure: the left part shows a type of the element, the right part has a result or an entered value and its name on top. In addition to tokens there are pure numbers and math operators. HISTORY You can set an expression as a variable with the goal to use it afterwards in other expressions and give every component a clear name to recall what it stands for easily. Create a calculation, and next time you reuse it from History section, every component will clearly speak to you. Almighty Version is a recurrent subscription with such options: 1 month, 6 month and 1 year. Confirmation of purchase is required to start free one week trial period. The subscription begins immediately. Payment will be charged to iTunes Account at the end of the trial period. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user’s Account Settings after purchase. Any unused portion of a free trial period will be forfeited when the user purchases a subscription. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Privacy Policy https://www.invoodoo.com/privacy-policy Terms of Use https://www.invoodoo.com/terms-of-use

About

Calculator´

This app is a powerful and intelligent calculator with a smart UI and live results. It offers basic, advanced, and scientific functions, a history log, customizable themes, and user-definable functions. It also includes features like an on-screen timer and iPad multitasking support.

Highlights
  • Live results and natural feel UI
  • User-definable advanced functions
  • History log with easy access
  • Customizable themes and colors
  • On-screen timer
  • iPad multitasking and Spotlight search
Features
Read full description

Stop your math time-wasting today with this app! Designed to help you zip through your daily math in a swift of your own unique style ;-) * LOVED by thousands for its smart UI with Live results & Natural feel Now featuring user-definable advanced Functions that you can Share easily with other Calculator users and optimizations with iPad multitasking, 3D Touch shortcuts, Expandable Widget, Spotlight searching of History + watchOS native App with haptic. Calculator is super intelligent, multi-functional scientific calculator that makes doing math look like art. It has built-in on-screen timer, notif. center Widget, Custom Keyboard, many pre-set functions like Date-time and Base computations and limitless combination of colors, fonts, shapes and sizes. It features standard basic & scientific calculator functions, history log, and an elegant user interface. The quick timer is designed to help your track remaining mins:secs whenever you are on schedule. It is really clever. It can do live math expressions: from the simplest like "1+2" to more advanced expressions like "3+(3x9(80+sin(90)))" Advanced calculator. By swiping left and right on the app, you can easily access over 50+ advanced math functions. History log. Calculator remembers what you have calculated. Swipe up, and you can see all your previous calculations. Colorful Themes. Limitless lovely themes for you to browse, including optional parallax background image of your choice! Easy access. Tap & Hold a math expression to edit it. Shake your device to undo Tap & Hold a number key for smart parenthesis Tap & Hold the decimal point for RANDOM decimal Tap & Hold the “ans” key for answer history Tap & Hold the “÷” key for 1/x Tap & Hold the “-” key to negate Text style Edit option for Expressions Tapping sound options An In-App purchase is ready if you decide to add the Converter and Basic Graphing! Terms of Service & Privacy Policy: https://oval.fi/privacy-calculator Subscription Terms The subscription auto-renews at the end of each term. Payment will be charged to iTunes Account at confirmation of purchase. The subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period. You may manage your subscription and turn off auto-renewal by going to your Account Settings after purchase. Any unused portion of a free trial period will be forfeited if you purchase a subscription. Instructions on how to cancel a subscription can be found at the following link: https://support.apple.com/en-us/HT202039.

Screenshots

Calcularium4 screens
Calculator´3 screens

Verdict

The call

The clearest difference is ads: Calculator´ at none against Calcularium's shown. Calculator´ also leads on iOS requirement (14.0 vs 18.0). Calcularium's advantage is update cadence (fortnightly vs every 5 weeks) and ratings volume (2.2K vs 465). On price, rating, review sentiment and in-app purchases 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. Calcularium sells 7 in-app purchases, starting at $3.99 per month and Calculator´ sells 4 in-app purchases, starting at $0.49 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for Calcularium against 4.6 for Calculator´. Both are backed by a comparable volume of ratings — 2.2K and 465 respectively. Written reviews split almost evenly too, at 67% and 68% positive.

UpkeepUpdate frequency

Calcularium ships an update fortnightly, Calculator´ every 5 weeks. The most recent releases landed on September 25, 2026 and September 22, 2026 respectively.

Scorecard4 real differences · 6 level
Calcularium versus Calculator´: the parameters behind the verdict, then further details
ParameterCalculariumCalculator´
PriceFreeFree
Rating4.6 (2.2K ratings)4.6 (465 ratings)
Positive reviews67.3% of reviews67.7% of reviews — better
Number of ratings2.2K — better465
Update frequencyFortnightly — betterEvery 5 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod, Apple Watch — better
Requires iOS18.014.0 — better
Further details — not scored
Size52 MB13 MB
Age rating4+4+
DeveloperInVooDoo LLCOval Software Oy

Customer experience

Calcularium

All ratings2,174 ratings
Positive89.7%
Neutral3.3%
Negative7.1%
Written reviews49 reviews
Positive67.3%
Neutral6.1%
Negative26.5%

Calculator´

All ratings465 ratings
Positive91.4%
Neutral2.8%
Negative5.8%
Written reviews99 reviews
Positive67.7%
Neutral10.1%
Negative22.2%

User reviews

Calcularium

From 2.2K App Store ratings

What we love

  • 🚀 Powerful and feature-packed
  • 👍 Easy to use with great tutorials
  • 🎨 Beautiful and customizable design
  • 💡 Innovative features like real-time calculation
  • 🙌 Excellent value for money

Room to improve

  • 🔍 Confusing or unintuitive interface
  • 📢 Excessive advertisements
  • 🐛 Calculation errors or inconsistencies
  • 🔒 Limited functionality in free version

Calculator´

From 465 App Store ratings

What we love

  • 👍 Clean and intuitive user interface
  • 🚀 Fast and efficient performance
  • 📊 Shows calculation progression like paper tape
  • 🎨 Customizable appearance and themes
  • 📱 Works well as iPhone/iPad replacement for default calculator

Room to improve

  • 💰 Switched to subscription model from free/one-time purchase
  • 😤 Bait-and-switch pricing strategy
  • 🔐 Paywall on basic features like clear button
  • 📺 Ads and pop-ups introduced
  • ⚠️ Removed features after update

Bugs and requests

Calcularium

Reported bugs

3 issues
  • Crashes or freezes on certain devices
  • Incompatibility with older iOS versions
  • Issues with calculator widget functionality

Requested features

4 requests
  • Add basic calculator functions like equal and clear buttons
  • Improve unit conversion and scientific functions
  • Integrate with Shortcuts and Siri
  • Provide more customization options

Calculator´

Reported bugs

6 issues
  • Buttons below numbers 1, 2, 3 not responding
  • App crashes when screen fills with numbers
  • Numbers deleted backwards after full screen
  • Swipe down converter doesn't work properly on iPad
  • Pressing equals multiple times adds duplicate results
Show 1 more
  • App becomes unresponsive and requires restart

Requested features

7 requests
  • Haptic feedback support
  • Fraction calculation support
  • RPN mode
  • iCloud sync for history
  • Automatic parentheses
Show 2 more
  • Simple keyboard-only option
  • Better converter UI (swipe functionality)

In-app purchases

7 purchases

Calcularium

Subscriptions4
  • Almighty Version$3.991 Month
  • Almighty Version$4.996 Months
  • InVooDoo One$5.991 Month
Show 1 more
  • Almighty Version$29.991 Year
One-time3
  • Unlock Pro Version$199.99
  • Lifetime Almighty Version$199.99
  • Remove Ads Only$199.99
4 purchases

Calculator´

Subscriptions3
  • Standard features w/ Free Week7 Days trial$0.491 Year
  • Standard features w/ Free Year1 Year trial$0.491 Year
  • Complete feature-set3 Days trial$3.991 Year
One-time1
  • Converter + Graphing$3.99

Questions

Is Calcularium free?
Calcularium is free to download, with in-app purchases available.
Is Calculator´ free?
Calculator´ is free to download, with in-app purchases available.
Which has better reviews, Calcularium or Calculator´?
Calcularium and Calculator´ are both rated 4.6 out of 5 on the App Store, from 2.2K and 465 ratings respectively.
Do Calcularium or Calculator´ have ads?
Calcularium shows ads; Calculator´ does not.
Which is updated more often, Calcularium or Calculator´?
Calcularium ships an update fortnightly, and Calculator´ every 5 weeks. Most recently, Calcularium was updated on September 25, 2026 and Calculator´ on September 22, 2026.

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