Show HN: Tiny Moon – Swift library to calculate the moon phase

The linked article is about a lightweight and minimalist website framework called TinyMoon. It is designed to be easy to use, with a simple and clean structure that allows for quick development of responsive websites. The article provides an overview of the framework's features, including its small file size, mobile-first approach, and support for modern web standards.

Tiny Moon is a tiny Swift library to calculate the moon phase for any given date, works super fast, and works completely offline.

All of this started when I realized that we only have 12, sometimes 13, full moon's in a year. That doesn’t seem like that many.

I set out to build a MacOS app to remind me when a full moon occurs, so that I could take a moment and step outside to appreciate it.

The MacOS app I ended up creating can be found at https://apps.apple.com/us/app/tiny-moon/id6502374344 along with the source code [0], all powered by the Tiny Moon library.

I knew that I wanted the app to work offline, so working with a network request was out of the picture. Taking inspiration from SunCalc [1] and Moontool for Windows [2], I decided to create my own library and wrote Tiny Moon as a Swift Package to power my app.

The app tries to be as minimal as possible, does what it does very fast, and works completely offline.

[0] https://github.com/mannylopez/TinyMoonApp

[1] https://github.com/mourner/suncalc

[2] https://www.fourmilab.ch/moontoolw/