koyomi-app

A calendar app that brings traditional Japanese almanac data to your fingertips.

View Rokuyo (lucky/unlucky days), daily Heavenly Stems & Earthly Branches, Nine Star Ki, 27 Lunar Mansions, moon phases, 24 Solar Terms, 72 Pentads, and Doyo periods — all in one app.

Features:

• Month view with daily almanac details at a glance
• Week view for a focused weekly overview
• Day view with comprehensive details including lunar calendar date, moon age, and seasonal markers
• Customizable display settings — show only the information you need
• Fully offline — no internet connection required