Kalkulilo (Calculator) app for iPhone and iPad


4.8 ( 608 ratings )
Productivity Education
Developer: Alexander Clauss
1.99 USD
Current version: 5.0, last update: 1 year ago
First release : 11 Feb 2019
App size: 3.61 Mb

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.

Pros and cons of Kalkulilo (Calculator) app for iPhone and iPad

Kalkulilo (Calculator) app good for

Very well done. Better than most of the useless and not free applications on offer.
Direct and functional. And its free! No annoying "update" button.
Perfect replacement for the Apple app. Key sizes are just right.
This is certainly much more featureful than the Apple calculator. My only gripe is that hitting the mode button to see the instructions wipes out the Stat data; it would be better if this wasnt wiped unless you change modes.
a free calculator which has all features of a scientific calc. many of the other apps which have lots features for a calc cost money and as some wit no money i cant afford 2 bucks :)
Good design. No missing buttons and no useless ones either Thx for this program

Some bad moments

Looks AWSOME but I cant open it. When I tap it it says cannot be opened ??????
I thought the iPhones native calculator was too lmtd, but turn it sideways and it basically does everything. So deleting this one now
I would gladly support you, but ads are tasteless and super anoying.
Works good. But I paid to remove adds and they keep pushing USLESS annoying adds. Makes me wonder what for I paid ???
Why would you not put adding adds in your change log? I have used your app since it was released and would have been willing to pay for it. I have recommended your calculater to all my friends but will now search out a new app that does not put adds in without telling and then recommend that app to tell. This shady move has cost you a life long customer.
This update adds an advertising banner to what used to be my favorite calculator app without mentioning the new ads in the release notes. I recommend looking elsewhere...

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