Twinkle Clock vs World Time Calc

Twinkle Clock turns your screen into a night sky — a clock face made of twinkling stars and constellations. FREE • 12 zodiac constellations, swipe to switch • A twinkling starfield with the time overlaid on constellation lines PRO (one-time purchase) • All 88 official constellations • ~8,900 naked-eye stars across the whole sky • The Milky Way and the Moon & planets (Mercury–Saturn) • Nebulae, star clusters, and galaxies • Tap any star, the Moon, or a planet to read about it • Time Travel — pick any date and time to see what the sky looked like (or will look like) • Major meteor shower activity windows Available on iPhone, iPad, Mac, Apple TV, and Apple Vision Pro.

・Features of the WorldTimeCalc ・Graph of day/night and working hours in each city. - Day and night time will be updated automatically every day. Working hours can be changed manually for each city. ・By sliding the cursor, the time for each city will change in the list. ・In normal times, the cursor points to the current time in real time, so you can see at a glance whether it is daytime, nighttime, during business hours, or outside in each city. ・You can send alarm notifications for sunrise, sunset, start time, and end time.