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Best Astronomy Apps Free to Download for iPhone (2026)

8 of 10 ranked · · how we rank

8 astronomy apps on iPhone are free to download; 3 of them sell in-app purchases. Night Sky is the best of them at S tier, rated 4.7 by 497,429 people. The order below is the same S to F ranking as the full list, with the apps that cost money to download removed.

  1. 1
    Night SkyS#1 overall
    Free + IAP · ★ 4.7 · 497,429 ratings · score 98
    Identifies stars, planets, constellations and satellites overhead using an iPhone, iPad or Apple Watch, with AR views…
  2. 2
    Star Walk:Find Stars & PlanetsS#2 overall
    Free download · ★ 4.7 · 25,020 ratings · score 94
    Stargazing app that shows stars, planets, constellations and satellites in real time as you move your device.
  3. 3
    Star Walk 2 Plus: Live Sky MapS#3 overall
    Free + IAP · ★ 4.6 · 95,912 ratings · score 94
    Star Walk 2 Plus is a stargazing app that maps stars, planets and constellations in the sky shown on your device screen.
  4. 4
    Solar Walk Ads+:Planets SystemA#5 overall
    Free + IAP · ★ 4.6 · 9,839 ratings · score 86
    Interactive 3D model of the Solar System with planets, moons, comets and other space objects, plus educational space.
  5. 5
    The Constellation Star FinderB#6 overall
    Free download · ★ 4.7 · 4,351 ratings · score 70
    Identifies constellations, stars, planets and satellites when you point your phone at the sky.
  6. 6
    Astronomy & Space NewsD#7 overall
    Free download · ★ 4.8 · 2,827 ratings · score 57
    Astronomy news app covering space exploration, exoplanet discovery, astrobiology, and the search for life beyond Earth.
  7. 7
    Solar Walk 2 Ads+:The UniverseF#9 overall
    Free download · ★ 4.7 · 6,814 ratings · score 43
    Free reference app with a 3D Solar system model, space mission details, an astronomy event calendar and panoramic.
  8. 8
    solAR - Solar System in ARF#10 overall
    Free download · ★ 4.6 · 2,116 ratings · score 43
    Displays the Sun, planets and moons as 3D models that can be placed in your real surroundings with augmented reality.

Questions people ask

Which astronomy app that is free to download is best on iPhone?
Night Sky, S tier, #1 overall in astronomy. It is free to download, with in-app purchases.
Does a astronomy app that is free to download reach S or A tier?
Yes, Night Sky, Star Walk:Find Stars & Planets, Star Walk 2 Plus: Live Sky Map, Solar Walk Ads+:Planets System.

See all 10 astronomy apps ranked →