Satrelle vs Astrian Light

On August 12, 2026, the moon's shadow crosses Spain at more than two thousand kilometers per hour. Satrelle tells you exactly when it reaches the spot where you're standing, to the second, computed on your phone, no signal required. FREE, A COMPLETE OBSERVER'S TOOL • Contact times C1-C4 for your exact position, from NASA Besselian elements, computed entirely on-device • Totality duration, sun altitude, and a live countdown • Set your site by GPS, on the map, or by typing coordinates • The 2026 and 2027 eclipses, plus future events • Works fully offline, in a field, on a mountain, anywhere THE PHOTOGRAPHER'S KIT, ONE PURCHASE, YOURS FOREVER Everything you use with a camera in your hands: • Exposure toolkit, Espenak tables computed for your aperture, ISO, and filter, with live atmospheric extinction for your sun altitude • Corona-pass fit, how many full bracket ladders your totality holds • Eclipse-day mode, timed voice callouts, camera-filter warnings, and T-minus haptics through all four contacts • Live Activity, the countdown on your lock screen and Dynamic Island • Rehearsal mode, practice your totality before you spend it • Site comparison, save candidate sites and compare their durations • Clock verification against NTP, contact times ride on your clock • Manual contact times from any limb-corrected site prediction The Kit is a single one-time purchase. It includes the August 2027 eclipse and every eclipse after it, it's shareable with your family, and every feature works with no connection at all. SAFETY Never look at the sun without ISO 12312-2 eclipse glasses. The only exception is totality itself, between second and third contact, and Satrelle tells you exactly when that is.

Other apps tell you when the sun rises. This one tells you whether you'll see it. Astrian Light knows the real terrain where you're going to shoot —the ridge, the building, the hill in front of you— and tells you when the sun actually clears it. Not when it rises on a flat horizon that doesn't exist. WHAT IT ANSWERS · When the good light starts at your spot, and when the terrain takes it away. · Where the sun rises and sets, right on the map. · How many hours of dark sky the Moon leaves you tonight, measured against your horizon. · When the Milky Way core rises, and which is the next moonless night. · What the eclipse will look like from where you'll be, when, and how long totality lasts. ECLIPSES, ALWAYS FREE On August 2, 2027, a total solar eclipse crosses Spain. The map of every eclipse, how much of the sun is covered from any point, the timeline to the second, and whether your horizon lets you see it. No subscription, now or ever. YOUR GEAR, BUILT IN Over 600 lenses and 230 cameras in the catalog; if yours isn't there, type it in. From then on, the ten calculators speak your gear: exposure without star trails, hyperfocal, depth of field, field of view, filters, timelapse. And "Your frame" shows how the shot will look in your camera before you go. THE SKY, RIGHT NOW Point your iPhone at the sky and augmented reality tells you what you're looking at: planets, constellations, the space station, deep sky. PLAN BEFORE YOU LEAVE Compare several destinations and several nights at once. Save plans with their place, their date and the gear you're taking. And bring the verdict with you: the calculations work without signal. YOUR WAY Buttons with symbol and name, or name only. Light and dark themes. Times in your iPhone's format. In English, Spanish and Portuguese, on iPhone and iPad. WHAT IT WON'T DO It doesn't make data up. When it doesn't know, it says so: if there's no measured terrain for your point, it tells you the figure is for a flat horizon. If the forecast doesn't reach, it won't invent one. SUBSCRIPTION Astrian Light is free for eclipses and for today's sky where you are. Everything else —any date, any place, the whole sky, all your gear— needs the yearly subscription. It renews until you cancel, and you cancel from your Apple account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/