A Solar Compass vs Abfahrt

A Solar Compass calculates the exact moment the sun aligns with any bearing on Earth — from your current position toward any target location on the globe. Set your source location (via GPS or manual coordinates) and a target location. The app computes the precise local time when the sun's azimuth matches that bearing, displays a live countdown, and — if you want them — sends reminders so you never miss the window. KEY FEATURES • Sun alignment calculator — uses real astronomical equations (Julian Day, solar declination, local sidereal time, azimuth) to find the next alignment within a 5-day look-ahead window. • Live countdown — a real-time timer counts down to the exact alignment moment, right on the home screen or Lock Screen. • Home Screen & Lock Screen widgets — keep the countdown visible without opening the app. • Share to Solar Compass — share a map pin or a link to a place from Maps, Safari, or Messages, and apply it as your position or your target in one tap. • GPS location — tap "Use GPS" to populate your coordinates automatically. • Manual coordinates — enter any latitude/longitude for full control. • Automatic timezone detection — fetches the correct UTC offset for your source location so the displayed time is always local. • Alignment reminders — turn on notifications 60, 30, 10, 5, and 1 minute(s) before the alignment, plus one when it happens, so you have time to step outside. One tap on the bell icon turns them on or off. • Report wrong calculation — send feedback directly from the result screen if something looks off. • Privacy-first — location data is stored on your device. Anonymous crash reporting is opt-in. HOW IT WORKS 1. Open the app — your last-used or IP-detected location loads automatically. 2. Confirm or adjust your source and target coordinates. 3. The next alignment time and a live countdown appear instantly. 4. Turn on reminders (the bell icon) to be notified before the moment arrives. PERMISSIONS USED • Location (when in use) — to detect your position via GPS for the calculation. Never sent to any server without your consent. • Notifications — to deliver alignment reminders (opt-in, and can be turned off in-app at any time). No account required. No sign-up. No ads.

Abfahrt is a departure board for the Rhein-Main-Verkehrsverbund: the S-Bahn, U-Bahn, trams, buses and regional trains in and around Frankfurt, read the way somebody standing at the stop reads it. WHAT IT SHOWS • What leaves next, with the live time rather than the timetable wherever RMV has one. • Which way out it goes from — the platform at a station, or the side of the street, named by the stop everything there calls at next. • How late it is running, and whether it has been cancelled at all. • Where the next vehicles of a line actually are, drawn on a map, when you tap it. • The whole run of a train or bus, stop by stop, with the times it is keeping. • Service messages from across the network, narrowed to the lines and stops you care about. NEAR ME The stops within 500 metres, nearest first, with the modes that call at each one. Abfahrt opens here, so it asks for your position when this screen is shown — one reading at a time, never followed — and passes it through its own server to RMV to find the stops around you. Say no, and search, saved stops and boards all go on working. KEPT ON YOUR PHONE The stops you save, and the order you put them in, stay on the device. There is no account to make and nothing to sign in to. NOTHING IS TRACKED No advertising, no analytics, no cookies, no account and no profile of you anywhere. Nothing is sold. BUILT TO BE READ A stop can run eight modes and a phone holds one, so modes start folded and what you open stays open. The minutes are set large because they are the thing you are squinting at from the far end of a platform; everything else is set quietly. Live data comes from the open interface of the Rhein-Main-Verkehrsverbund. This is not an RMV product and cannot sell you a ticket — for fares and official notices, see rmv.de.