# Seasonal World Clock — Day & Night Worldwide > Day & Night Worldwide (iPhone/iPad app by microseed publishing.) - Source: https://appshunter.io/ios/app/seasonal-world-clock/id6781682355 (this page in markdown: same URL + `.md`) - Developer: [microseed publishing](https://appshunter.io/developer/361964914) - Category: Lifestyle, Utilities - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 18.6 · 30 MB - Languages: American English, French (France), Japanese, Chinese (Simplified, China), Latin American Spanish, Chinese (Traditional, Taiwan) - Released: 2026-06-28 - Data updated: 2026-08-23 - User reviews in markdown: https://appshunter.io/ios/app/seasonal-world-clock/id6781682355/reviews.md ## What is Seasonal World Clock? A clock inspired by the traditional Japanese Wadokei, which was used during the Edo period. The dial changes with the seasons and latitude, making it a unique clock that lets you see the length of daylight around the world at a glance. (This app is not intended to be a historically accurate reproduction of the structure or operation of traditional wadokei clocks.) == What is a Wadokei? == A wadokei is a traditional Japanese clock used during the Edo period. It was designed to indicate time according to the Japanese temporal hour system. In this system, the time from sunrise to sunset was considered daytime, and the time from sunset to the next sunrise was considered nighttime. Each period was divided into six equal parts. Because the lengths of day and night vary depending on the season and latitude, the length of each temporal hour also changes. This is why the system is known as a "temporal hour" system. This app draws its clock face based on the sunrise and sunset times of a selected location, and displays the current temporal hour and the length of each hour. Although this way of telling time is no longer used in daily life, it offers a unique opportunity to experience local perceptions of time that differ from the uniform hours used today. ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Sencha | $0.99 | one-time | | Matcha | $2.99 | one-time | | Gyokuro | $5.99 | one-time | ## Version history (last 4 releases) ### 1.2 — 2026-08-13 * Added Map View. Small Wadokei clocks are plotted on the map, allowing you to see the day/night lengths and current times of preset cities and saved locations at a glance from a geographical perspective. * Added French language support. * Added a Settings screen. You can now switch between 12-hour and 24-hour time formats and choose what happens after adding a saved location. * Added sunrise and sunset notifications. You can enable them from the Settings screen. * Made other minor UI layout adjustments. ### 1.1 — 2026-07-13 * Added List View mode. You can select up to 24 locations and view their Wadokei clocks as compact cards. * Tap a card in List View mode to display the Wadokei clock for that location in the familiar large view (Detail View mode). * In Detail View mode, you can now swipe horizontally to switch between the previous and next locations configured in List View mode. * Made minor UI improvements. ### 1.0.1 — 2026-07-03 Fixed an issue affecting some display elements. ### 1.0 — 2026-06-28 No release notes. ## Apps similar to Seasonal World Clock | App | Rating | Price | Category | | --- | --- | --- | --- | | [時の舟人](https://appshunter.io/ios/app/id6757370590) | — | Free | Lifestyle | | [PixelMug-Your smart life](https://appshunter.io/ios/app/pixelmug-your-smart-life/id6748008040) | 1.4 (8) | Free | Lifestyle | | [Sampo: Get Paid to Walk](https://appshunter.io/ios/app/sampo-get-paid-to-walk/id6763270420) | 2.6 (5) | Free | Lifestyle | | [Old Japanese Clock Lite](https://appshunter.io/ios/app/old-japanese-clock-lite/id867913934) | 4.5 (4) | Free | Lifestyle | | [ONMYOJI Divination & Rituals](https://appshunter.io/ios/app/onmyoji-divination-and-rituals/id587732404) | — | Free | Lifestyle | | [CheckTimeYo](https://appshunter.io/ios/app/checktimeyo/id6504262821) | — | Free | Lifestyle | ## More apps by microseed publishing - [The Blue Sand of Mercurius vol.1 ja](https://appshunter.io/ios/app/the-blue-sand-of-mercurius-vol1-ja/id361964911) - [The Blue Sand of Mercurius vol.1](https://appshunter.io/ios/app/the-blue-sand-of-mercurius-vol1/id361981089) - [The Blue Sand of Mercurius vol.2 ja](https://appshunter.io/ios/app/the-blue-sand-of-mercurius-vol2-ja/id361982447) - [The Blue Sand of Mercurius vol.2](https://appshunter.io/ios/app/the-blue-sand-of-mercurius-vol2/id361983423) - [ReziQ - POS for Flea Market](https://appshunter.io/ios/app/reziq-pos-for-flea-market/id6754535783) All apps by microseed publishing: https://appshunter.io/developer/361964914 --- *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 2026-08-23.*