StarTeller vs Telescope

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 15,000 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: - 15,000+ deep-sky objects across the Messier, NGC, IC, SH2, Barnard, Caldwell, Lynds, Melotte, and other catalogs - Full visibility data for every object: rise, peak, and set times, altitude arc, observing duration, nights visible per year from your location, magnitude, angular size, and coordinates in J2000 or JNow - Real reference photos for every target, so you know what you're aiming at before you set up - Search by object name, catalog ID (e.g. M42, NGC 6992), or constellation; filter and sort by type, catalog, altitude, size, and best date - Interactive sky map for any location and date, with constellation lines, star names, object paths, and an altitude grid - Altitude timeline: scrub through the night and watch any object's arc update in real time, on any night past or future - Telescope framing: save your scope and camera (focal length, reducer or Barlow, sensor size, or a direct field of view) and see exactly how a target frames up before you shoot - Custom horizon: trace your real skyline through the camera and StarTeller factors your trees and rooftops into every visibility calculation - Astronomical darkness: civil, nautical, and astronomical twilight, plus the exact dark window for tonight - Moon planning: phase, illumination, moonrise and moonset, angular size, and the next new and full moon dates - All seven planets tracked in real time, with rise, set, and peak times from your location - Set and save unlimited locations easily by using GPS, map pin, or manual coordinate entry, and keep your targets in a dedicated favorites view - 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 15,000+ objects across NGC, IC, SH2, Barnard, Caldwell, Lynds, Melotte, 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.

Telescope turns your iPhone into a complete stargazing companion. Whether you're a first-time sky-watcher or a seasoned amateur astronomer, Telescope helps you plan your sessions, identify what's overhead, and keep a lasting record of everything you observe. Tonight tab — know what to look at before you step outside. Telescope computes real-time visibility for hundreds of deep-sky objects and planets based on your GPS location. Every object is ranked by peak altitude so you always start with the best targets. Filter by type — planets, stars, nebulae, galaxies, open clusters, globular clusters — and tap any row for full details. Full Catalog — browse the complete object library at any time. Each entry shows magnitude, constellation, minimum aperture needed (naked eye, binoculars, or telescope size), and a description. Mark favorites to jump back quickly, or add objects to your wishlist for future sessions. Observation Log — record your sightings as you make them. Log date, location, telescope used, conditions, and personal notes for every object you observe. Your history builds into a searchable personal archive of the night sky. Accurate Astronomy — positions are computed using established low-precision ephemeris formulae (Meeus, Duffett-Smith) accurate to roughly ±1°. Planet positions update in real time. All calculations happen on-device; no internet connection required. - Tonight visibility ranked by peak altitude and score - Real-time planet positions for Mercury, Venus, Mars, Jupiter, Saturn - Deep-sky catalog: nebulae, galaxies, clusters, and more - Personal observation log with notes and conditions - Favorites and wishlist for fast session planning - Works fully offline