The sky over the place and day that mattered — computed on your iPhone, kept as a plate.
Pick a place and a date, past or future. Firmament draws the real sky over that spot at that minute — sun, moon, twilight, and the bright stars — as a quiet, museum-grade plate you keep, gift, or share. Everything is computed on your device. Nothing is collected; nothing leaves your phone.
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From Hadger — privacy-first, on-device tools.