Your night sky, with a journal you can keep. Stars Well is an offline Mac planetarium and observing companion: bright stars, 88 constellations, 110 Messier objects, Moon and planet views, and tools for planning an evening outside. OBSERVING LOGBOOK Record dated sightings with your equipment and notes. Search by object, gear or text; edit past entries; track the Messier objects you have observed. Removed sightings remain available to restore. PORTABLE BACKUPS Save a JSON backup containing active and removed sightings. Preview the number of records before merging another backup. Identical records are skipped and conflicting edits are rejected without overwriting your local journal. Plain-text log export remains available in Deep Sky. PLAN A NIGHT Tonight combines twilight, Moon information, ranked targets and sky events. Session Pack assembles a checklist you can copy or save. Night Route builds up to eight nonoverlapping target slots from your location, start time, equipment tier and altitude setting. Routes use five-minute samples and a greedy scheduling rule; they are not an optimal schedule. Weather, terrain, Moon interference and equipment limits are not modeled by Night Route. EXPLORE THE SKY Choose a city and view a live or frozen sky map. Toggle constellation lines, names, grids and horizon. Browse all 88 constellation charts and their stories, search the atlas, and save charts as images. Explore the 110 Messier objects with finder charts, altitude curves and approximate gear guidance. MOON, PLANETS AND EVENTS View calculated Moon phases, illumination, planet positions, rise and set times, and an almanac. Export your sky chart or use it as desktop wallpaper. CLEAR LIMITS Sky positions are for visual learning and planning, not navigation or telescope pointing. Planet calculations use elements intended for 1800–2050. Bortle class is chosen by you, not measured for a city. Brightness and stellar-limit figures are approximate reference estimates; the Moon adjustment is a simplified heuristic. Integrated magnitude does not predict whether a diffuse galaxy or nebula will be visible. Actual conditions and observer experience matter. PRIVATE BY DESIGN Core features work offline. No account, subscription, ads, analytics or Location Services. Your journal is stored locally. Files you choose to export can be saved or shared wherever you select. Support and privacy links open your browser. Everything included with one purchase.
Education · iPhone, iPad · $4.99
