Ave Maria Clock

About the App

Time Measured as It Was
for Centuries

The traditional Italian six hour clock divides the day into four six-hour periods — Primo, Secondo, Terzo, and Quarto — anchored to sunrise and sunset rather than the arbitrary midnight of the modern clock.

Ave Maria Clock brings this ancient way of experiencing time to your iPhone, combined with canonical hours, a live astronomical sky map, and the Roman liturgical calendar.

No account required. No advertising. No data collection. Your location is used only on-device for solar calculations and is never transmitted or stored.

Features

What's Inside

• Italian clock — four six-hour periods anchored to solar events, not clock midnight
• Canonical hours — Prime, Terce, Sext, None, Vespers, and Compline with notifications
• Sky map — live sun position, lunar phases, moonrise/set, constellation boundaries
• Liturgical calendar — Ordinary or Extraordinary Form, updated daily
• Ecclesiastical moon — daily Luna age as announced at Prime in the Roman Martyrology, computed from the Gregorian computus of Clavius
• Roman calendar date — Kalends, Nones, and Ides reckoning displayed alongside the clock
• Computus — Aureus Numerus (Golden Number) and Epacta displayed with traditional red-ink colouring
• Themes — Default, USA 250th Anniversary, and Vatican color schemes
• Location-aware — precise solar calculations for your exact coordinates
• Offline-capable — remembers your last known location for offline use
• Private — no analytics, no advertising, no account system