Calendar
Month, week and year views; jump to any date; 1901–2100.
The calendar that works without a network.
No ads · No tracking · Pay once · Computed, not looked up
Coming soon to the App StoreLunar calendar
Lunar dates including leap months, the 24 solar terms with the exact moment each begins, and the sexagenary cycle with its zodiac animal.
Almanac notes
The traditional daily almanac layer — notes, daily rating, clashes and the double-hour cycle — with the Xieji Bianfang Shu (1741) as its declared reference. The app’s sources page states where each part of the data comes from and what has not yet been checked against the book.
Different almanacs follow different source texts. Where this app differs from the one in your hand, that is expected — it takes the source it declares as its reference.
Sun and moon
Moon phase, moon age and illumination; sunrise, sunset and day length for your location or any city you pick.
Festivals
Traditional festivals — Lunar New Year, Mid-Autumn and the rest — computed from the lunar calendar, so they are right for every year in range.
It does not phone home
No ads, no tracking, no account, and no third-party SDK of any kind — including for crash reporting. Notifications, location and calendar access are requested only at the moment you use the feature that needs them, and everything else keeps working if you decline.
Four interface languages
English, Traditional Chinese (Taiwan), Traditional Chinese (Hong Kong) and Simplified Chinese. The Hong Kong option largely uses the Taiwan text, with a few words in Hong Kong usage — for example 公曆 instead of 國曆, and 通勝 instead of 農民曆.
Questions
Why pay once instead of subscribing?
A perpetual calendar does not need a server, so it does not cost us anything to keep running for you. Charging monthly for something that runs entirely on your phone would be charging for nothing. You pay once and it keeps working, offline, for as long as the phone does.
I changed phones. How do I get it back?
Open the app, go to More → Restore purchases. It asks the App Store what your Apple ID has bought. It needs a network connection for that one moment, and no account of ours.
The almanac notes differ from the one I own. Which is right?
Both can be. Printed almanacs follow different source texts and different editorial conventions, and they disagree with each other too. This app states which source it takes as its reference, and named notes can be opened inside the app to see the steps that produced them.
Which years does it cover?
1901 to 2100. That is the range covered by the Hong Kong Observatory’s day-by-day tables, which our lunar dates and solar-term dates were compared against; beyond it the app does not give results.
Get the app
US$14.99 · Pay once
Coming soon to the App Store