6 free stargazing apps for Android: what you get without paying

If you want one free app that shows what is above you, we would install Stellarium first: it found Saturn, showed when it is visible, kept its sky map in airplane mode and showed no ads in our session. If you want no paid upgrade at all, Sky Map is the simplest choice. We installed six free stargazing apps on one Android phone on 5 October 2026 and put each through the same checklist. We completed seven of its eight tasks; the eighth, pointing the phone at the real sky, needs an evening outdoors.

Below you can see what each app shows before you reach the sky, where the paywalls are, and what the developers say they do with your data.

How we tested

We used a Samsung Galaxy S25 Ultra running Android 16. All six apps came from Google Play and were set to English. We aimed to give every app approximate location, only while using the app. Stellarium briefly received precise access during setup; we withdrew it and continued with approximate location. We said no to notifications, did not create accounts, and did not buy anything or start a free trial.

Our checklist had eight tasks:

• Start the app for the first time and note everything it asks.
• Point the phone at the sky (see below).
• Search for Saturn, which in our test rose around 19:10 local time and stayed up all night.
• Tap a star or planet and see what information is free.
• Find a red night mode.
• Move the time forward to another evening.
• Restart the app in airplane mode.
• Note every paywall, offer and advert.

The phone stayed indoors on a desk. We did not test how well each app follows the phone when you hold it up to the real sky, so this article does not rank the compass or sensors.

Sky Map: free, open source and no paywall

Sky Map started life as Google Sky Map in 2009. According to the project's own page, Google stopped active support in 2011 and the original developers open-sourced it with Google's permission; they still maintain it in their spare time.

On first start, Sky Map showed a short summary of its terms with No Thanks and Accept. After accepting, a sensor check and a location question followed, and then the sky. Search found Saturn straight away and showed an arrow with "Point your phone toward the arrow". Tapping the star Procyon opened an info card with its distance (11.4 light-years), size and an image credited to ESO/Digitized Sky Survey 2. Night mode and "time travel" to another date were one tap away, and the sky map stayed available after a restart in airplane mode.

We saw no paywall and no ads. One setting is worth checking: Send usage statistics, which sends anonymous data to Google Analytics, was switched on by default. You can turn it off under Settings.

Stellarium: a detailed free sky, with a Plus upgrade

Stellarium asked for location access as soon as it opened. Because we tested in daylight, it pointed that out and showed the evening sky instead, which is a thoughtful touch.

Searching for Saturn showed "Visible from 19:10 to 07:34" right in the results, and zooming in brought up the rings and moons such as Dione and Janus. The info card for the star Vega listed its magnitude, distance and position and added several paragraphs of explanation. Night mode sits in the layers panel at the bottom left, and the time panel lets you slide through the night or jump a day ahead. The sky map stayed available after a restart in airplane mode.

There were no ads, but there were offers. While zooming, banners appeared such as "Get high resolution planet textures" and "Get a massive collection of sky objects, up to mag 22!", each with No thanks. The calendar, observing tools and some settings carried a lock. The upgrade screen offered Stellarium Mobile Plus with a free 7-day trial, then €2.39 a month, or €19.99 as a one-time purchase.

Sky Tonight: good for planning, but offers come first

Sky Tonight asked for our location and for permission to send notifications, then showed a full-screen Premium Access offer: lifetime access for €14.99, or a free trial that turns into an auto-renewing subscription of €1.09 a month after one week. Skip is in the top right corner.

Next came a consent window for personalised advertising. It said our data "may be stored by, accessed by and shared with 210 partners" and that partners "may use precise geolocation data". Under Manage options the switches were off by default, so we confirmed our choices without giving consent.

After that, the app was useful for planning. Search showed Saturn with the time it sets, and the map drew Saturn's path across the evening with hour marks. The "Visible Tonight" page gave a stargazing index and the Moon's phase for free, but the list of planets was blurred behind a lock. Night mode is under Settings, Tools. We did not see an advert in our session, possibly because we declined consent.

Star Walk 2: beautiful 3D, with ads consent and add-ons

Star Walk 2 comes from the same developer as Sky Tonight, and the start was similar: location, notifications, the same consent window with 210 partners, and then an Add-On Content offer: €9.99 once, €6.49 for 12 months, or €1.09 a month. The main screen had a Remove Ads button, and a banner at the top led to the same offer.

The free version handled the tasks we completed. Search found Saturn, and tapping its name opened a 3D model of the planet that you can turn with your finger, plus a general information page. Two of the tabs on that page were locked. Night mode is a switch in Settings, where we also found Sounds and Music switched on by default. The sky map stayed available after a restart in airplane mode.

When we accidentally tapped the camera icon, Android asked for camera access. That is for the augmented-reality view, where stars are drawn over the camera image. We declined, and the app explained that AR needs the camera.

SkyView Lite: simple, but read the privacy notice

SkyView Lite first asked whether to use the camera for augmented reality, then where we are. Before the location permission, it showed a Privacy Notice that is worth reading in full. It says that, to keep the app free, "certain authorized direct data collectors may collect personal location data and personal device data". It lists Wi-Fi network identifiers, precise location and Bluetooth scan records, and says this may be shared with other organisations for purposes such as advertising, analytics and market research. It names Outlogic. We chose Decline, which the notice offers on the same screen.

The search page has a box at the bottom, "Search all objects…", and typing Saturn found it straight away. Above it are lists such as "Tonight's Sightings" and "Solar System". Some lists, such as Star Clusters, Brightest Satellites and Nebulae, are marked Premium, and the Solar System list shows "Upgrade to explore Uranus, Neptune, and dwarf planet Pluto". Saturn's info card was free and detailed. Night mode is in the scene controls and switches between red and green. Music was on by default. The upgrade screen points to a separate paid app, SkyView, and promises "NO subscriptions" and "NO advertisements"; it did not show a price.

Star Chart: no hurdles at the start, and a star you can sponsor

Star Chart had the shortest start of the six: Android asked for location and notifications, a short animation of the Earth played, and then we were looking at the sky. No terms, no offer and no consent window.

Search is a list by category; tapping Saturn turned the map towards it, low in the east, and the zoom button gave a sharp close-up with the rings and moons labelled. Night mode has three settings: Off, On and Auto. The time strip let us move through the evening, and the sky map stayed available after a restart in airplane mode.

The paid part is unusual. Behind the plus button is Sponsor: "Sponsoring a star is the best way to support Star Chart, and makes a wonderful gift for someone you love." Prices run from €1.09 to €10.99 a month per star. We did not look into what sponsoring includes, so treat it as a way to support the app, not as naming a star.

What "free" really means: paywalls and ads

All six apps did the basics for free: show the sky, find Saturn, explain what you tapped, switch to red night mode and move through time. The difference is in what happens around that.

• Nothing to pay: Sky Map. In Star Chart we met no feature paywall in the checks we completed, only optional sponsorship.
• Offers along the way: Stellarium shows banners and locks for Plus features, but no full-screen offer at the start.
• An offer before the sky: Sky Tonight and Star Walk 2 showed a full-screen purchase screen during the first start. Read it carefully: the free trial in Sky Tonight turns into a subscription.
• Ads: Google Play lists ads for Sky Tonight and Star Walk 2. We saw no ads in our sessions of about 10 to 20 minutes per app, after declining advertising consent. That is a snapshot, not a promise.

What the apps say they do with your data

Every Google Play listing has a "Data safety" section, written by the developer. We read all six on 5 October 2026. These are the developers' own declarations; we did not check what the apps actually send.

• Sky Map declares that it shares no data with other companies. It may collect app performance data, app interactions and in-app search history for analytics, all marked optional.
• Stellarium declares that it shares device IDs and app interactions, for analytics.
• Sky Tonight declares that it shares crash logs, diagnostics and app interactions, and collects device IDs for advertising or marketing.
• Star Walk 2 declares no sharing, but collects device IDs, installed apps, and approximate and precise location.
• SkyView Lite declares that it shares device IDs, user IDs, and approximate and precise location, including for advertising or marketing.
• Star Chart declares no sharing, and collects device IDs, crash logs and, optionally, a name and user IDs.

All six listings said "Data can't be deleted", which means the developer does not provide a way to request that your data be deleted.

No phone? Stellarium on your computer

The same sky is available on a laptop. Stellarium Web runs in a browser without an account; it labelled our location "Near Amsterdam" and found Saturn, with rise and set times, in seconds. The full desktop program, Stellarium for Windows, Mac and Linux, is free, open source and has no ads. We installed version 26.3 and set it to Maastricht on 12 October 2026 at 21:00 to see Saturn and its moons as they will appear that evening.

The desktop program is also handy for planning: set a date, a time and a place, and see what will be up before you go outside.

New to Stellarium Web? Our step-by-step guide to Stellarium Web shows how to set your location, find a planet and switch on night mode.

Which app should you install?

It depends on what you want from the evening.

• You want one good free app: Stellarium. Detailed info cards, visibility times in search, a clear night mode, and the same sky on your computer.
• You want no paid upgrade and no ads: Sky Map. Simpler, and you accept its short terms once. Switch off usage statistics if you prefer.
• You like planning what to look for: Sky Tonight shows paths and times for tonight. Skip the offer and choose Manage options in the consent window.
• You want the prettiest view: Star Walk 2 and Star Chart, with 3D models and smooth animations.
• Privacy matters most: read SkyView Lite's privacy notice before you accept anything.

Want something to look for first? Our Geminid meteor shower guide gives the best hours for the strongest shower of the year.

One more thing we noticed: the apps do not always agree with current science. SkyView Lite said Saturn has 82 moons, Star Chart said 62, while NASA counts 293 confirmed moons as of August 2026. For the night sky that makes no difference, but for facts it is worth checking a primary source.

Common questions

Is there a stargazing app that is completely free and has no ads? In our test, Sky Map had no paywall and no ads, and Google Play lists neither. Star Chart and Stellarium had no ads but do offer paid extras.

Do stargazing apps work without internet? All six showed the sky map after we restarted them in airplane mode. Some extras, such as news or online images, may need a connection.

Why does a stargazing app need my location? To draw the sky as it looks from where you are. Approximate location was enough for every app in our test. Stellarium and Star Chart later asked to switch to exact location. We kept Star Chart on approximate; Stellarium briefly had precise access during setup, which we withdrew.

Do they have a night mode? Yes, all six had a free red night mode, which helps your eyes stay used to the dark.

Which app shows me where Saturn is tonight? All six found Saturn. Stellarium and Sky Tonight also showed when it is visible.

Is Stellarium or SkyView better? In our test Stellarium did more for free: detailed info cards, visibility times in search, a clear night mode, and the same sky on the web and on a computer. SkyView Lite was simpler, showed upgrade banners, and its privacy notice lists data collectors; read it before you accept anything.

What is Star Walk? Star Walk 2 is a stargazing app with 3D models of planets and smooth animations. In our test it asked for advertising consent and offered paid add-ons, with prices of €9.99 once, €6.49 a year or €1.09 a month on a Dutch Google account.

What is the best free stargazing app for iPhone? We tested the Android versions, so we cannot rank iPhone apps. Stellarium Mobile is also available for iPhone and iPad, and Stellarium Web is a website, so it does not need an app at all (we used it in a desktop browser).

How do I identify planets in the sky? Point one of these apps at a bright "star": the app names it. Without an app, our Tonight page shows which bright planets are up where you are.

How we checked

We installed the six apps from Google Play on a Samsung Galaxy S25 Ultra with Android 16 on 5 October 2026 and tested them between about 18:55 and 19:55 CEST that evening, in the south of the Netherlands. App versions: Sky Map 2.1.2, Stellarium 1.16.8, Sky Tonight 2.5.3, Star Walk 2 2.21.0, SkyView Lite 3.9.2 and Star Chart 7. We operated the phone from a computer with Android's developer tools (ADB), which let us take full-resolution screenshots and recordings of every step. Stellarium had been used on this phone before, so we cleared its app data first to see a true first start. We aimed for approximate location throughout; Stellarium briefly received precise access during setup, which we withdrew.

Prices are what the apps showed us in euros on a Dutch Google account on that day; they can differ in other countries and change at any time. The information on ads, purchases and data comes from each app's Google Play page and "Data safety" section, read the same day. Where we write that an app "shares" or "collects" data, we mean that its developer declares this. The quotes from consent screens and privacy notices are copied from the screens shown to us.

For the computer section we used Stellarium Web in a browser and Stellarium 26.3 for Windows, downloaded from the official release linked on stellarium.org.

All screenshots are our own captures, scaled down and with the phone's status bar cropped off. The diagrams were made by us from our test notes and the Google Play pages. None of the images is AI-generated. We tested on Android only and indoors, so we cannot say how the iPhone versions behave or how accurately each app follows the real sky. This is a snapshot from one phone on one evening, not a lab test. We will add a dated note when we notice a material change.