Kalkulilo (Calculator‪)‬ 4+

Alexander Clauss

    • 4.5 • 18 Ratings
    • $1.99
    • Offers In-App Purchases


Kalkulilo is a comfortable calculator program and offers several different modes.

- The scientific mode offers all the usual functions and operations like the basic arithmetical operations, power, logarithm, roots, trigonometry etc.

- The bit/integer mode offers logical operations (AND, OR, XOR, >>, etc.) on bit level. All values can be displayed as binary, octal, decimal or hexadecimal numbers. Calculations can be done in 8, 16 32 or 64 bits.

- In the statistics mode you can create a sample by adding several values and then calculate mean, median, quantil values, variance, standard deviation, range etc.

- Trigonometry mode provides lots of trigonometric functions

- The base/radix mode allows you to do calculations with numbers of base 2 to base 36

- The Time mode lets you directly work with time values (hours, minutes seconds)

- A simple calculator is also included, with just the basic operators and large buttons.

Colorized keys will help to distinguish between the different categories of the functions and operations. The user interface (design, colors) can be customized.

The App also includes a calculator widget for the notification center and a calculator App for the Apple Watch.

Note: This app uses ads to generate revenue to cover the costs for developement and support, and to be able to provide the App for free. But you can get rid of the ads permanently for a small fee via In-App purchase.

What’s New

Version 5.0

- New calculator mode added which deals with absolute values, integral, fractional, signum, ceiling, floor, truncate, gcd, lcm functions
- New option in the settings to copy numbers in the country-specific number format to the clipboard
- The swipe gesture to switch between the calculator modes can be switched off in the settings.
- The Watch App has received a slightly different design and layout

Ratings and Reviews

4.5 out of 5
18 Ratings

18 Ratings

12bar ,

Excellent calculator!

This is my go-to calculator for iPhone. It has everything you need for scientific, bit/integer, and statistics. I feel it was written for programmers. There are many cool options such as adjustable bit depth, etc. The negative reviews complaining about ads should pony up the money and buy the app!

BasenjiBuddy ,

Just what I needed!

I'm visually handicapped, and I've looked all over for a decent, well-designed calculator with the functions I need. The contrast on the button layout is helpful.

In earlier versions, I was annoyed by some rather poor VoiceOver support. It seems to have improved greatly, and as a bonus the developer has now added support for the Apple Watch! What's pleasing is that the Apple Watch support is actually well thought out. It works far better than other calculators I've tried on it. It was immediately usable and I am highly appreciative of that.

I've finally reached the point where I am deleting the other calculators I use. This app now does it all for me, and does it well.

suecqueue ,

A Pleasure to Use

Start with a full function calculator that has every mode you might want, including scientific, statistics, trig, binary, even a mode for time and circular angles such as latitude and longitude.
Now add a customizable user interface that is not merely useful, but beautiful, and this wonderful app is what you get.
I especially love being able to easily find different groups of functions by setting them to different colors, like pink for memory, green for trig, and greenish blue for roots and logarithms.
The buttons and number display are very easy to read even on a small iphone.
This is one of my 'must have' apps.

App Privacy

The developer, Alexander Clauss, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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