Kalkulilo (Calculator)

Kalkulilo (Calculator)

by Alexander Clauss

29 ratings
420 reviews
$2.99
In-App Purchases

Details

  • Released
  • Updated
  • February 11, 2019
  • August 5, 2026

Features

Kalkulilo (Calculator) screenshot #1 for iPhone
Kalkulilo (Calculator) screenshot #2 for iPhone
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Kalkulilo (Calculator) screenshot #5 for iPhone
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Kalkulilo (Calculator) screenshot #7 for iPhone
Kalkulilo (Calculator) screenshot #8 for iPhone
Kalkulilo (Calculator) screenshot #9 for iPhone
Kalkulilo (Calculator) screenshot #10 for iPhone
iphone
ipad
watch
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About

This app offers a versatile calculator with multiple modes, including scientific, bitwise, statistical, trigonometric, base conversion, and time calculations. It features a simple mode with large buttons and customizable interface. Widgets for notification center and Apple Watch are also included.

Scientific calculator functions
Bit/integer mode with logical operations
Statistical calculations
Base/radix conversion (2-36)
Time value calculations
Customizable interface
Apple Watch app and widget
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What users say

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+1

What's New in Kalkulilo (Calculator)

6.0.3

August 5, 2026

Fixes an issue when negating the result of a calculation ( for example to use the negated value for another calculation).

1

In-App Purchases

$0.99

Remove Ads

Removes all the Ads from the App, so the App can be used ad-free and the full screen is used for the calculators.

User reviews

Toller Rechner ohne Tastatursteuerung

Es wäre schön, wenn ich - wie beim Apple-Rechner - die Eingabe über das Magic Keyboard meines iPads tippen könnte.

Zufrieden,aber …

Insgesamt positiv, eine Primzahlberechnung vermisse ich schmerzlich.

New colors are terrible

Not only are the standard colors now terrible, there is no option to revert back to previous patterns. You have to select individual groups of keys to change. And the options to change to are still terrible. My eyes hurt just looking at this.

Excellent, stopped working on Apple Watch OS26

I love this calculator for the ability to have some scientific calculation available on the Apple Watch. (Revised) It required a re-install after upgrade to watchOS 26 to have it work on my watch.
I particularly like the variety of modes and the ability to do math in any number system, not just binary, decimal and hexadecimal.
The size of the keys is also reasonably sized despite the functionality. I am basically using it as my primary calculator all the time
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Excellent, stopped working on Apple Watch OS26

I love this calculator for the ability to have some scientific calculation available on the Apple Watch. However the app does not load on the Apple Watch Ultra 2 after upgrading to OS26 anymore. Still works fine on the iPhone under iOS26

Developer apps

User experience

🐞

Reported Bugs

3 issues

Number doesn't transfer correctly when switching between modes

Bug

Negative exponents not displayed correctly in engineering notation

Bug

Loses calculation history when changing modes

Bug

Requested Features

5 requests

Add calculus, linear algebra, and probability functions

Feature

Implement a 'repeated equals' function

Feature

Add a backspace/delete button

Feature

Allow customizing color scheme

Feature

Improve Apple Watch integration

Feature

FAQ

What kind of calculations can this app perform?

This app offers a wide range of calculation modes. These include scientific functions like powers and logarithms, bitwise operations for binary and hexadecimal numbers, statistical analysis for data sets, trigonometric functions, base conversions from 2 to 36, and direct time value calculations. A simple mode with basic operators and large buttons is also available.

What are the different modes available in the calculator?

The app provides several specialized modes: Scientific mode for advanced math, Bit/Integer mode for logical operations on bits, Statistics mode for data analysis, Trigonometry mode for trigonometric functions, Base/Radix mode for number base conversions, and Time mode for working with time values. A basic calculator mode is also included.

How can I remove ads from the app?

The app includes ads to support its development and to remain free for users. You can permanently remove these ads by making a small one-time in-app purchase. This purchase helps cover the costs of development and ongoing support.

Is this app compatible with Apple Watch?

Yes, the app includes a dedicated calculator application for the Apple Watch, allowing you to perform calculations directly from your wrist. It also offers a calculator widget for the notification center on your iOS device for quick access.

Can I customize the appearance of the calculator?

Yes, the user interface of the calculator can be customized. This includes adjusting the design and colors to your preference. The app also features colorized keys to help visually distinguish between different categories of functions and operations.