# koyomi-app

> koyomi-app (iPhone/iPad app by Algo K.K..)

- Source: https://appshunter.io/ios/app/koyomi-app/id6761350611 (this page in markdown: same URL + `.md`)
- Developer: [Algo K.K.](https://appshunter.io/developer/1888324506)
- Category: Lifestyle, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 15.1 · 26 MB
- Languages: American English
- Released: 2026-03-31
- Data updated: 2026-10-07

## What is koyomi?

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


## Version history (last 2 releases)

### 1.1 — 2026-04-15

- Improved app stability and performance
- Removed unnecessary permission requests

### 1.0 — 2026-03-31

No release notes.

## More apps by Algo K.K.

- [IBCA](https://appshunter.io/ios/app/ibca/id6761421565)
- [王様のmimi](https://appshunter.io/ios/app/mimi/id6761583662)
- [フレームワーク38](https://appshunter.io/ios/app/38/id6797429450)
- [Golf Metrics 初ラウンドの相棒](https://appshunter.io/ios/app/golf-metrics/id6809659618)

All apps by Algo K.K.: https://appshunter.io/developer/1888324506

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-07.*