DeepSkyCentral vs Star Map Night Sky
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DeepSkyCentral
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DeepSkyCentral is your AI-powered astronomy companion for all astronomers both visual observers and astrophotographers — plan your sessions, find your targets, and manage your gear all in one place. Built by astronomers- for astronomers. ASTRO AI, YOUR PERSONAL ASSISTANT Ask anything about astronomy, imaging, or equipment and get expert answers instantly. Astro AI recommends targets based on your location, gear, and the night's conditions, plus weather predictions built specifically for astronomical observing. FIND YOUR TARGETS AND YOUR SKY Use Target Finder and SkyView together with the FOV Image and Visual Framers to see exactly how a target will look through your telescope or camera before you head outside. Dark Sky Finder helps you locate the darkest nearby skies, and the Astro Calendar tracks moon phases and astronomical events. WEATHER & 10 DAY FORECAST MODELS Every astronomer has a keen eye for the weather - DeepSkyCentral Astro AI provides a summary of the current and upcoming conditions. Leverage the 10 day forecast with extensive data including cloud cover, seeing, transparency and dew predictions. And live radar (Pro subscription) FOV Calculator and Framer Find and frame your favorite targets with ease. See what your eyepiece or camera sees through your rig and frame your targets with ease. Create mosaics, and save directly to your personal Frame Library ( pro subscription). PLAN AND ORGANIZE EVERY SESSION Build Target Lists and Checklists, set up custom Equipment Profiles for your rigs, and use the Polar Alignment tool to get your mount dialed in fast. DeepSkyCentral's smart Session Planner and Session Diary (Pro Subscription) allows you to setup and record all your astro activity. Never miss a night, plan your sessions and get the most out of your astronomy journey. TARGET DATA Data includes best time of year to view or image a target, where the target is best viewable in the night sky, which filters to utilise, and detailed target summary. OVER 660,000 OBJECTS AND STARS Download specialized catalogue packs including the complete NGC/IC catalogue, the Washington Double Star Catalog, Sharpless HII regions for narrowband imaging, and a Gaia DR3 star field to magnitude 10 for precision framing and guiding — all available offline at your dark sky site. GO FURTHER WITH PRO Astro AI Pro, live satellite weather and cloud radar, live Aurora and Solar activity stats, the Astro Session Planner & Diary, an Image Library with plate solving, FITS file renaming and folder organization tools, unlimited locations and equipment profiles, and access to the Community Gallery and Dark Sky Location community sharing. EDUCATION AND KNOWLEDGE Extensive knowledgebase and terminology sections dive deep in the world of astronomy to help the beginner astronomer navigate through the night sky. Whether you're just starting to explore the night sky or refining an advanced astrophotography workflow, DeepSkyCentral brings everything you need into one place. Essentials and Pro are auto-renewing subscriptions, managed anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internal/terms/itunes/dev/stdeula/
Star Map Night Sky
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SpaceUtil is a star map with AR that helps you find constellations, explore a 3D solar system, follow the ISS tracker live and see where Voyager is right now. The whole night sky in one astronomy app, with no account, and almost everything computed on your device without an internet connection. ■ AR STAR MAP AND SKY VIEWER • Point your phone at the sky to see the stars and constellations in that direction. • 120,000 stars and all 88 constellations with lines, names and artwork. • AR mode overlays the sky chart on your camera view. • Red night mode for comfortable stargazing in the dark. • Search for a star, planet or constellation and an arrow guides you to it. • Rewind or fast-forward time to see the sky on any date. ■ 3D SOLAR SYSTEM • An orrery with the Sun, the eight planets and major moons in their real positions. • Rotate and zoom with your fingers, and tap a planet for its story. • Live distances to each planet, Jupiter's four big moons and Saturn's rings. • Follow conjunctions and planet alignments. ■ LIVE ISS TRACKER • See where the International Space Station is right now on a 3D globe and a world map, updated every second. • Visible pass predictions for your location with time, direction and altitude. • A sky-path view of each pass. ■ WHERE ARE VOYAGER 1 AND 2? • Follow the two farthest human-made objects on a 3D map of the solar system. • See their current distance from Earth, computed on your device from public space-agency reference data. ■ TONIGHT • A briefing on tonight's observing conditions based on the moon phase and twilight times. • 5 objects worth looking at right now. • Sun, moon and planet rise and set times. • Civil, nautical and astronomical twilight. ■ MOON, ECLIPSES, METEOR SHOWERS • Moon phase calendar and lunar age. • Upcoming solar and lunar eclipses. • Every major meteor shower with its peak night and how bright the moon will be. ■ ASTROPHOTOGRAPHY HELPERS • 500-rule exposure calculator. • Milky Way planner. • Golden hour, blue hour and moonrise direction. ■ LEARN AND PLAY • Constellation myths and a space quiz. • The sky on your birthday and light travel time. • Light-year, AU and parsec converter. • An exoplanet catalog. • An observation log with badges. ■ GETTING STARTED • Open the star map and hold your phone up toward the sky. • Switch on AR mode to see constellation lines over the camera image. • Turn on red mode once you are outside in the dark. • Search for a planet or star and follow the arrow. • Check Tonight before heading out. ■ WHO IS IT FOR? • Stargazers identifying stars and constellations with AR. • Space fans tracking the ISS, the Voyager probes and planetary alignments. • Astrophotographers planning Milky Way shots. • Anyone learning about exoplanets, myths and moon phases. ■ TIPS • Use time controls to preview the sky on an eclipse date. • Check how bright the moon will be before a meteor shower peak night. • Log what you observe to collect badges. ■ FAQ • Do I need an account? No. There is no account and no cloud. • Does it work offline? Almost everything is computed on your device. • Is the camera image saved? No, never. • Are there ads? A single banner ad at the bottom of the screen supports development. No full-screen or video ads. ■ PRIVACY AND PERMISSIONS • Location is used only on the device to align the sky map. • The camera powers the AR view, and its image is never captured, stored or sent anywhere. Data sources: an open star catalog (CC BY-SA) and public satellite, space-weather and planetary data. SpaceUtil is not affiliated with or endorsed by the data providers. Clear skies from SpaceUtil.
Screenshots
Verdict
The clearest difference is ads: DeepSkyCentral at none against Star Map Night Sky's shown. DeepSkyCentral also leads on update cadence (every 6 days vs fortnightly). On price, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
DeepSkyCentral ships an update every 6 days, Star Map Night Sky fortnightly. The most recent releases landed on October 18, 2026 and October 17, 2026 respectively.
| Parameter | DeepSkyCentral | Star Map Night Sky |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 days — better | Fortnightly |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.4 | 15.0 — better |
| Further details — not scored | ||
| Size | 130 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Dean Stewart | tanzsoft |
In-app purchases
DeepSkyCentral
No in-app purchases
Star Map Night Sky
No in-app purchases
Questions
Is DeepSkyCentral free?
Is Star Map Night Sky free?
Do DeepSkyCentral or Star Map Night Sky have ads?
Which is updated more often, DeepSkyCentral or Star Map Night Sky?
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