EggXact - Egg Timer

EggXact times boiled eggs the way a physicist would.

Instead of guessing, the app uses the egg's weight, the egg's starting temperature, and your altitude to compute a cook time grounded in heat diffusion equations. Get the doneness you actually want, every time.

CLASSIC BOILING Set egg weight, the egg's starting temperature, and target doneness from liquid yolk to hard. EggXact applies the Williams heat diffusion formula and adjusts for the air pressure read by your device's barometer, so the cook time matches your altitude.

PERIODIC COOKING Alternates the egg between hot and cold water in eight cycles. Based on the Musto and Di Maio method, this technique cooks the white and yolk at their optimal temperatures without separation. Total time: 32 minutes, no thermometer needed.

KEY FEATURES

• Multi-egg timers using Williams formula or periodic cooking, all in one app
• Cooking timers with three modes: single, sync start, sync end
• Doneness presets (Liquid, Soft, Waxy, Hard) or custom yolk temperature
• Altitude calibration via barometer
• Live Activity on Lock Screen and Dynamic Island
• Metric and imperial units
• No accounts, ads, tracking, or paywalls. Everything runs on device.