Sidereal
Plan, shoot, and perfect your astrophotography
Sidereal brings together exposure calculators, an interval timer, a celestial compass, a deep sky object catalog, weather forecasting, and equipment management — all in one app designed for use under dark skies.
Whether you're capturing your first Milky Way shot or imaging faint nebulae with a star tracker, Sidereal helps you get the settings right, stay on schedule, and find your targets.
Features
- Exposure Calculator - Get sharp stars every time. Calculate maximum exposure times using the 500 Rule or the more precise NPF Rule, with field of view and integration time estimates
- Interval Timer - Track your imaging session frame-by-frame with on-screen progress, notifications, and an optional floating overlay
- Celestial Compass - Find Polaris, the Milky Way, and deep sky objects using a real-time compass with altitude and azimuth display
- Deep Sky Object Catalog - Browse galaxies, nebulae, and star clusters. Filter by type, difficulty, or what's visible tonight. Plan your targets before heading out
- Sky Planner - Simulate the sky for any date, time, and location. Plan sessions days or weeks ahead for trips to dark sky sites
- Weather & Clear Sky Alerts - Check cloud cover forecasts at a glance and get notified when conditions are ideal for imaging
- Gear Locker - Manage your cameras, lenses, and telescopes with a searchable database of sensor and lens specs
- Night Vision Mode - Preserve your dark adaptation with a red-on-black interface, triggered automatically by your phone's light sensor or set manually
- Wear OS Companion - Control your session from your wrist with interval timer, compass overlays, twilight times, and a red-light torch
Screenshots
