Fresnel

Long before satellites drew our routes across the dark, a single burning wick behind a wall of stepped glass could pull a ship home. Fresnel is a quiet almanac of that stubborn, salt-worn craft — the towers, the lenses, the keepers who climbed the same stairs for forty years to trim a flame no traveler ever thanked. Each entry glows like a night watch: the ink-blue hush of the sea, a small amber pulse turning somewhere far offshore.

The app opens into a shelf of illustrated stories, sorted by era and by the science that made distant light possible — catoptric mirrors, the revolutionary stepped lens, the choreography of clockwork and mercury floats. Every lighthouse carries its true light character, the exact rhythm of flashes that once told sailors which tower they were passing; tap it and the screen breathes that pattern back at you in real time. Test what you remember with short quizzes, save the towers that hold you, and let a gentle evening chime invite you back to the next watch. Everything lives on your device, offline, like a lamp that never needs the mainland.