Calendar
Month, week and year views; jump to any date; 1901–2100.
Almanaut
Every day, worked out from the sky.
A perpetual calendar that works offline, computing every lunar date and solar term on your phone.
- No ads
- No tracking
- Pay once or subscribe
- Computed, not looked up
Coming soon to the App Store
US$59.99 · One-time purchase | Subscriptions from US$2.99 / month
25
September 2026 · Friday
Lunar month 8, day 15
Mid-Autumn
Next solar term
Lunar calendar
Lunar dates including leap months, the 24 solar terms with the exact moment each begins, and the sexagenary cycle with its zodiac animal.
Sun and moon
Coming phases
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.
Almanac notes
Good for
Avoid
Double hours
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.
Your calendar stays on your phone
- No ads
- No tracking
- No sign-in needed
- No third-party SDK
No ads, no tracking, no sign-in needed, and no third-party SDK of any kind — including for crash reporting. Nothing from your calendar ever leaves the phone. Optional online services send a little device information to our server at most once a day; they are off by default in the EU, EEA, UK, South Korea and mainland China, and you can turn them off any time. Notifications, location and calendar access are requested only when you use the feature that needs them.
Questions
Should I pay once or subscribe?
Both unlock exactly the same full version. A one-time purchase keeps it forever and includes one feature request. Monthly, quarterly and yearly subscriptions keep it while subscribed: the yearly plan gives three feature requests for each paid year plus ongoing priority support (first reply within one business day); monthly and quarterly plans earn one for every four paid months, up to three a year. Subscriptions renew automatically and can be cancelled any time in your App Store account settings. Prices are shown in the App Store in your currency.
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 to do this, 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.
Do I need an account?
No. Everything in the app works without signing in. An account is optional and exists only for members who want cloud backup; you can create one in the app or on the Account page of this site, and delete it there at any time.
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$59.99 · One-time purchase | Subscriptions from US$2.99 / month
Coming soon to the App Store