Gokoce Trail

Gokoce Trail is your personal deep-sky companion — a fully offline astronomy logbook that shows you exactly what is worth observing in your sky tonight, based on real optics, real conditions, and your real gear. Before you carry your telescope out, the built-in visibility solver does the hard work. It factors in true altitude calculations, current moon illumination, your Bortle sky-darkness rating (1 to 9), atmospheric seeing, transparency, and the optical reach of your equipment to deliver a clear verdict on each object in the catalog. No internet required. No location permission ever requested — you enter your observing coordinates yourself, keeping your privacy fully intact. The curated catalog covers 40 deep-sky highlights every observer wants to track: galaxies, nebulae, planetary nebulae, globular clusters, open clusters, and double stars. Filter by object type or best observing season to plan what to hunt next. Tap any object for its right ascension, declination, apparent magnitude, angular size, constellation, and a plain-language description — all stored on-device and available anywhere you set up. Logging your nights is fast and honest. Create an observation session for any site, record sky conditions and the gear you brought, then attach each sighting directly to that session. Your observing history builds naturally over time, giving you a searchable record of where you observed, what you saw, and how dark the sky really was. Whether you are learning the sky with binoculars or chasing faint fuzzies with a long-focal-length refractor, Gokoce Trail grows with you.