StarTeller

Find the best night for any deep-sky object from your location. Precise on-device calculations: no internet, no AI, no guesswork. Just math. Built for astrophotographers.

Introducing StarTeller for iOS: your personal guide to the night sky, built for astrophotographers who refuse to miss a shot.

StarTeller takes the guesswork out of planning your next imaging session. With a catalog of over 13,000 deep-sky objects at your fingertips, you'll know exactly when each target rises, peaks, and sets, down to the minute, so you can make every clear night count.

Whether you're chasing faint nebulae, distant galaxies, or glittering star clusters, StarTeller tells you the best night to image each object from your exact location. See how long each target will be above the horizon, check its coordinates, and preview reference images, all before you ever step outside.

Built as a planning companion for your telescope rig, StarTeller helps you build a session plan around what the sky is actually offering tonight. No more scrolling forums or cross-referencing almanacs. Just open the app, pick your targets, and know exactly when to shoot them.

All visibility calculations run on your device with precise astronomical math, no internet required. Reference images load online, or download them in Settings for offline use. No AI-generated answers, just deterministic astronomy math that works anywhere, including dark sites with no signal.

StarTeller Features:

• 13,000+ deep-sky objects across the Messier, NGC, IC, SH2, and other catalogs
• Full visibility data: rise time, peak time, set time, altitude arc, observing duration, nights visible per year from your location, magnitude, angular size, and more
• Coordinates displayed in J2000 or JNow epoch, HMS or decimal degrees
• Search by object name, catalog ID (e.g. M42, NGC 6992), or constellation
• Filter and sort by object type, catalog, altitude, size, best date, and more; set a minimum altitude to exclude objects below your horizon
• Set and save unlimited locations easily by using GPS, map pin, or manual coordinate entry
• Save favorites and browse them in a dedicated view
• Interactive sky map showing the night sky for any location and date, including exact sunrise and sunset times, and exactly where any deep-sky object will be at any moment during the night
• Altitude timeline: scrub through the night and watch any object's altitude arc update in real time
• Dynamically browse any night, past or future, instantly
• AR sky mode: point your phone at the sky to align the map with the real night above you
• Night vision red mode to preserve your dark adaptation in the field
• Core planning works fully offline; optional image downloads for complete offline use

Free includes the complete Messier catalog (110 objects) and access to all app features. Upgrade to StarTeller Pro to unlock all 13,000+ objects across NGC, IC, SH2, and additional catalogs.

Whether you're a seasoned astrophotographer or just getting started with your first telescope, StarTeller puts the entire night sky on your schedule.

The sky is waiting. Show up ready.