Calcularium

• InVooDoo One — $5.99

Last verified 6 Aug 2026

4.6 2175 ratings · App Store

1. 5/5A calculator that doesn’t quite do calculations correctly

   Calculator doesn’t work well with adding subtracting of the same calculation. Have to add numbers only or subtract them only. Heaven forbid you want to divide! Horrible

   CMGTME · 6 Aug 2026

2. 5/5Best calculator I have run into.

   Not only only this app a power house with functions, expressions, in addition to simple calculations, it is also easy to use. Comes with a large collection of tutorials to help users get the most out of the many features this app provides. I love that I paid for the Almighty version awhile back and they haven’t tried to squeeze more money from me. There is definitely honor in this company. They do offer subscriptions that provide many apps, I may consider trying them as the need arises. Thanks for the wonderful product and good business practice.

   Unxini · 6 Aug 2026

3. 4/5Tons of Potential + Beautiful

   This is easily the most beautiful calculator I’ve seen on iOS or anywhere - the design and usability are first-rate. This calculator would instantly become my go-to primary calculator if it wasn’t for one thing - the calculator is missing some fairly standard operations. You can’t easily do squares or cubes or x^n or take a square root or do e^x or natural logs etc... and it doesn’t recognize Pi or E verbally. I think the only way to use constants at the present time is to use up one of the 8 calculation pages for each constant you want to save.... but since there are only 8 I’ve entered my commonly-used ones and am already down to only 3 pages remaining. I’m a huge fan... and if I need to do simple calculations I’ll use this app - but until it can support slightly more complex operations or constants/conversions then I’m going to have to stick to PCalc42. So much potential, so beautiful and sooo close to being perfect for me.

   Method5440 · 6 Aug 2026

4. 5/5Excellarium!

   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 then any tipping app! I hope the developer expands these functions for Shortcuts and Siri. This would be real killer app! Thanks guys!

   Z!KeepeR · 6 Aug 2026

5. 5/5Such a simple function but the first app to do it right

   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 · 6 Aug 2026

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