Relativity Widget vs AnyCalendar

Relativity Widget allows you to visualise Einstein's theories of relativity right on your home screen. Two modes : • Special Relativity: imagine that you are in a spaceship travelling at a chosen speed. If you travel fast enough, time will pass differently on earth... • General Relativity: you are on earth while a friend of yours went on a journey, in a spaceship, at a chosen distance to a Schwarzschild black hole. If you are close enough, time will pass differently in the spaceship... Relativity Widget clocks represent the difference in time flow, since midnight, between a high speed / high gravity experiencing reference frame and a low speed / gravity one, according to Einstein's theory of relativity.

AnyCalendar lets you view, convert, and compare dates across 16 calendar systems from around the world. Whether you're tracking Islamic holidays, following the Persian new year, checking the Hebrew date, or just curious about the Mayan Long Count, AnyCalendar has you covered. Supported calendars: - Gregorian, Julian, ISO Week Date - Islamic (Hijri), Persian (Solar Hijri) - Hebrew, Chinese, Buddhist, Indian Civil (Saka) - Ethiopian (Ge'ez), Coptic, Baha'i (Badi) - Julian Day Number, Unix Timestamp, Mayan Long Count Features: Today at a glance See today's date in every calendar system. Tap any date to copy it to your clipboard. Reorder and hide calendars to show what matters to you. Date conversion Convert any date between any two calendar systems with full timezone support. Side-by-side comparison View two calendar month grids aligned day-by-day. Navigate months and see how dates line up across systems. Home screen widgets Add small or medium widgets to your home screen showing today's date in your chosen calendars. Dark mode, haptic feedback, and native script display included. Your preferences are saved between sessions.