Open Source Kotlin Scientific/Engineering Software

Track satellite passes with ease. Thanks to the huge database provided by Celestrak and SatNOGS you have access to more than 5000 active satellites orbiting Earth. You can search the entire DB by satellite name or by NORAD catnum. Satellite positions and passes are calculated relative to your location. To get reliable info make sure to set the observation position using GPS or QTH Locator in the Settings menu. The application is built using Kotlin, Coroutines, Architecture Components and Jetpack Navigation. It is now and always will be completely ad-free and open-source.

A simple and beautiful calculator for Android.

Breezy Weather is a privacy-focused, open-source Android weather app with a clean and modern interface. It aggregates weather data from various providers while respecting user privacy, offering features like current conditions, forecasts, and weather widgets. The app is designed to be lightweight, customizable, and completely ad-free.

Translate You is a Translator App built with Material Design 3 (You). It supports multiple different translation engines such as LibreTranslate, Lingva, DeepL and more. In total, there are more than 200 supported languages across 6 different translation engines.

Kotlin∇ is a type-safe automatic differentiation framework written in Kotlin. It allows users to express differentiable programs with higher-dimensional data structures and operators. We attempt to restrict syntactically valid constructions to those which are algebraically valid and can be checked at compile-time. By enforcing these constraints in the type system, it eliminates certain classes of runtime errors that may occur during the execution of a differentiable program. Due to type-inference, most type declarations may be safely omitted by the end-user. Kotlin∇ strives to be expressive, safe, and notationally similar to mathematics.

Could be pronounced as key-math. The Kotlin Mathematics library was initially intended as a Kotlin-based analog to Python's NumPy library. Later we found that kotlin is a much more flexible language and allows superior architectural designs. In contrast to numpy and scipy it is modular and has a lightweight core. The numpy-like experience could be achieved with math-for-real extension module.

Map location picker component for Android. Based on Google Maps. An alternative to Google Place Picker. Component library for Android that uses Google Maps and returns a latitude, longitude and an address based on the location picked with the Activity provided. Note that you have the voice_search_extra_language that is used for the language of the voice recognition. Replace it with the allowed voice recognition locale for your language. We encourage you to add these languages to this component, please fork this project and submit new languages with a PR. It's possible to hide or show some of the information shown after selecting a location. Using the bundle parameter LocationPickerActivity. You can change the visibility of the street, city or the zipcode. By default the search will be restricted to a zone determined by your default locale.

Andrafting is an open source Android application to create Technical Drawing exercises. This application is inspired by the 'Classical Construction', also known as 'Ruler-and-compass Construction' or 'Compass-and-straightedge construction'. However, another drawing tools can be used. (More info about classical construction: https://en.wikipedia.org/w/index.php?title=Compass-and-straightedge_construction). TABLET & MOUSE recommended Desktop version (not compatible) https://sourceforge.net/projects/jdrafting/