# 暦 Reki - Japanese Era Calendar — Wareki&Western Date Converter

> Wareki&Western Date Converter (iPhone/iPad app by TOMONARI NATSUKAWA.)

- Source: https://appshunter.io/ios/app/reki-japanese-era-calendar/id6781997074 (this page in markdown: same URL + `.md`)
- Developer: [TOMONARI NATSUKAWA](https://appshunter.io/developer/6772284354)
- Category: Utilities, Reference
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 7 MB
- Languages: American English, Japanese, Korean, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2026-06-21
- Data updated: 2026-08-14
- User reviews in markdown: https://appshunter.io/ios/app/reki-japanese-era-calendar/id6781997074/reviews.md

## What is 暦 Reki?

「暦 Reki」is a simple and elegant app for converting between Japanese era dates (wareki) and the Western calendar.

【Features】

■ Today's Calendar
· Today's Japanese era date displayed prominently
· Rokuyou (traditional fortune calendar: Taian, Butsumetsu, etc.) with explanations
· Eto (Japanese zodiac) with emoji and name
· Current solar term and days until the next
· Lunar (old) calendar date shown alongside the Western date
· Moon phase with illumination % and moon age
· Lucky day banner for Tenshabi and Ichiryu-manbai-bi
· Countdown to year-end and next Japanese public holiday
· Year progress bar

■ Date Conversion & Lucky Day Lookup
· Instantly convert wareki ↔ Western dates
· Quick-input buttons for era names (Reiwa, Heisei, Showa, Taisho, Meiji)
· Camera OCR to scan era dates from documents (on-device processing)
· Voice input for hands-free date entry
· Conversion history saved automatically
· Look up the rokuyou and lucky-day status for any date — handy for picking a date for a wedding or move

■ Birth Year Lookup
· Enter a birth year to see the corresponding era, zodiac sign, and age

■ Siri Shortcuts
· Just ask "What's today's era date in Reki"
· Shortcuts for date conversion and deep links to each screen

■ Widgets
· Home screen widget showing today's Japanese era date, with a minimal "big number" style option
· Lock screen widget support, including a moon phase progress ring

■ Apple Watch
· View today's wareki, rokuyou, eto, and solar term on your Apple Watch
· Watch face complications (circular, rectangular, inline)
· Customizable theme colors

【Privacy】
Camera and microphone processing is done entirely on-device. No personal data collected, no ads, no third-party SDKs.

【Languages】
日本語 · English · 简体中文 · 繁體中文 · 한국어

Covers all modern Japanese eras: Reiwa (令和), Heisei (平成), Showa (昭和), Taisho (大正), and Meiji (明治).

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Support Developer – S | $0.99 | one-time |
| Support Developer – M | $2.99 | one-time |
| Support Developer – L | $4.99 | one-time |



## Version history (last 2 releases)

### 1.0.1 — 2026-08-10

· Added Siri Shortcuts support — just ask "What's today's era date in Reki."
· The Today screen can now show the lunar (old) calendar date alongside the Western date.
· Added moon phase display, showing illumination % and moon age; the lock screen widget shows it as a progress ring.
· Added lucky day info: Tenshabi and Ichiryu-manbai-bi, shown as a banner on Today when they occur.
· The Lookup screen can now check the rokuyou and lucky-day status for any date — handy for picking a date for a wedding or move.
· Added a minimal "big number" widget style option.
· Fixed some widgets showing English names in the widget gallery regardless of your language setting.

### 1.0.0 — 2026-06-22

No release notes.

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## More apps by TOMONARI NATSUKAWA

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All apps by TOMONARI NATSUKAWA: https://appshunter.io/developer/6772284354

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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 2026-08-14.*