StormLog

StormLog is a private, offline observation journal for anyone who watches the sky. Log every rare weather phenomenon — thunderstorms, auroras, halos, mammatus clouds, eclipses, sun dogs, rainbows and more — with date, place, intensity 1 to 5 and your own notes. Browse a clean timeline with colored category dots, jump straight to a monthly Calendar view, or open a full Search screen with intensity chips and sort options. Group observations into named Places (your favourite hills, roofs, viewpoints) or Trips (Iceland 2025, Norway winter, mountain weekend). Keep a Watch List of phenomena you still want to see and tap "I saw it" to convert them into new observations. Ten achievements unlock as you log more — First Observation, Storm Chaser, Aurora Hunter, Eclipse Master, Diverse Observer, Prolific and more. There are no accounts, no ads, no tracking — every entry stays on your device.