Calcularium vs ClevCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Reactive Calculations
- Voice Control (Siri)
- Script and Photo Input
- Multi-Level Sub-Calculations
- Editable History
- Unit and Currency Conversion
- Customizable Functions
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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
ClevCalc
This comprehensive calculator app offers a wide range of tools for everyday calculations, from basic arithmetic and scientific functions to unit and currency conversions. It includes specialized calculators for loans, health, fuel costs, GPA, and more, all within a clean and user-friendly interface.
- Scientific calculator
- Unit converter
- Currency converter
- Loan calculator
- Health calculator (BMI, BMR)
- Date calculator
- GPA calculator
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This calculator allows you to easily handle all the calculations necessary for everyday life with a single application. A free calculator app with a clean interface and practical functions! List of calculators currently supported: 1. Calculator ( + Scientific Calculator ) • Supports the four fundamental arithmetic operations, square, root, parentheses and percentage operations. • Supports scientific operations such as trigonometric, exponential and logarithmic functions. • Possible to modify incorrectly entered expressions with a freely movable cursor. • Simple and easy. • History available. 2. Unit Converter • Supports length, weight, width, volume, time, temperature, pressure, speed, fuel efficiency, and the amount of data. • Supports all unit conversions commonly used in everyday life. 3. Currency Converter • Supports 135 currencies in the world, including dollar, euro, yen, yuan, etc. • Automatically calculates using the real time exchange rate. 4. Percentage Calculator • You can easily calculate the percentage increase or decrease. • You can also calculate what percentage one number is of another. 5. Discount Calculator • Get a discount price by entering the original price and the discount rate. 6. Loan Calculator • You can calculate the total interest and total payments by entering the loan principal and interest rate. 7. Date Calculator • A feature that calculates the specific date or anniversary to be remembered! 8. Health Calculator • You can measure the body mass index (BMI) and the basal metabolic rate (BMR). 9. Automobile Fuel Cost Calculator • You can calculate the fuel costs required for driving a car or traveling. • Enter a distance and a fuel efficiency to get a fuel cost. 10. Fuel Efficiency Calculator • Enter the amount of fuel used to get the fuel efficiency. 11. GPA Calculator • You can correctly calculate your GPA! 12. Tip Calculator • The tip amount to be added will be automatically calculated if you enter the billing amount and tip percentage. • There is a function not to calculate tips on tax. • You may calculate the amount per person by dividing final amount by the number of people. 13. Sales Tax Calculator • Get a total price by entering the original price and the tax rate. 14. Unit Price Calculator • Enter the price and the quantity and you will get the unit price. • You can compare unit prices of various goods. 15. World Time Converter • Transforms the time of 400 or more cities around the world. • Daylight savings time will also be reflected in this calculation. 16. Ovulation Calculator • Calculates the time of ovulation and fertility using the menstrual cycle! • You can also create notes by date. 17. Hexadecimal Converter • Converts between decimal and hexadecimal with ease and convenience. 18. Savings Calculator • If you enter deposit amount, interest rate and time period, the interest after tax and final savings balance will be calculated. [ Terms of Use ] https://www.apple.com/legal/internet-services/itunes/dev/stdeula [ Disclaimer ] Cleveni Inc. makes no warranty as to the accuracy or reliability or suitability of any calculation results or information provided through the ClevCalc app. Cleveni Inc. is not also responsible for any damages, direct or indirect, which may occur by the calculation results or information provided through the ClevCalc app.
Screenshots
Verdict
Calcularium and ClevCalc both sit at 4.6 stars, but that hides the real split: 91% of ClevCalc's written reviews are positive against 66% of Calcularium's. ClevCalc also leads on ratings volume (14K vs 2.2K) and iOS requirement (15.0 vs 18.0). Calcularium's advantage is update cadence (fortnightly vs monthly). On price, rating, ads 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
Both are free to download. Calcularium sells 7 in-app purchases, starting at $3.99 per month and ClevCalc sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.6 for Calcularium against 4.7 for ClevCalc. That said, the two scores are not equally well evidenced: ClevCalc has 14K ratings behind it against 2.2K, so its average is the more settled of the two. Written reviews are what separate them: 66% of Calcularium's written reviews are positive against 91% of ClevCalc's.
Calcularium ships an update fortnightly, ClevCalc monthly. The most recent releases landed on November 7, 2026 and November 10, 2026 respectively.
| Parameter | Calcularium | ClevCalc |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (2.2K ratings) | 4.7 (14K ratings) — better |
| Positive reviews | 65.5% of reviews | 91.1% of reviews — better |
| Number of ratings | 2.2K | 14K — better |
| Update frequency | Fortnightly — better | Monthly |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 52 MB | 117 MB |
| Age rating | 4+ | 4+ |
| Developer | InVooDoo LLC | Cleveni Inc. |
Customer experience
Calcularium
ClevCalc
User reviews
Calcularium
From 2.2K App Store ratingsWhat 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
ClevCalc
From 14K App Store ratingsWhat we love
- 👍 Easy to use
- 🚀 Efficient calculations
- 💡 Versatile features (currency, unit conversions, etc.)
- 👍 Intuitive interface
- 👍 Helpful for daily tasks
Room to improve
- 💰 Subscription model too expensive
- 🔍 Ads can be intrusive
- 🐛 Occasional UI issues (e.g. ads blocking functionality)
- 🔍 Lack of advanced features (e.g. RPN mode, binary calculator)
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
ClevCalc
Reported bugs
2 issues- Keystrokes not always registering
- Compatibility issues with older devices
Requested features
4 requests- Dark mode option
- Ability to save/recall calculations
- More customization options
- Integration with other apps/platforms
In-app purchases
Calcularium
- Almighty Version$3.991 Month
- Almighty Version$4.996 Months
- InVooDoo One$5.991 Month
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- Almighty Version$29.991 Year
- Unlock Pro Version$199.99
- Lifetime Almighty Version$199.99
- Remove Ads Only$199.99
ClevCalc
- Premium Subscription3 Days trial$2.991 Month
- Premium Subscription3 Days trial$24.991 Year









