If you’ve searched for a stargazing app, you’ve almost certainly run into these two names. Both SkySafari (by Simulation Curriculum) and Stellarium (originally a free desktop project, now also available as a mobile app) are among the most trusted tools for identifying stars, planets, and deep-sky objects — but they’re built for different kinds of users.
Table of Contents
This guide breaks down what each app actually does well, how much they cost across their different tiers, and which one fits your setup — whether you’re a casual backyard observer or someone running a telescope with GoTo tracking.
Quick Answer
For casual stargazing and stunning sky visuals at no cost, start with Stellarium — the desktop version is completely free, and the mobile app (iOS and Android) is also free to download with an optional Plus in-app upgrade. If you own a telescope and want deep observation planning, logging, and GoTo/telescope control, SkySafari (especially the Plus or Pro tier) is the stronger tool and worth paying for.
How the Two Apps Actually Differ
SkySafari comes in tiers — Basic, Plus, and Pro (currently on SkySafari 8) — for iOS and Android, with pricing that scales from a few dollars for Basic up to tens of dollars for Pro depending on promotions. Pro is the version built for serious observing: it includes a large stellar and deep-sky object database, telescope control via ASCOM, INDI, SkyFi, Celestron WiFi, and StarSense Explorer, high-resolution Moon mapping, and plate-solving support. Simulation Curriculum also offers a Premium membership (a yearly or monthly add-on) that layers extra content like live satellite tracking and expert commentary onto any SkySafari 7 or 8 app.
Stellarium’s desktop program (Windows, macOS, and Linux) is free and open source and is known for its photorealistic rendering of the sky — the kind of visuals used in planetariums and classroom projectors. Stellarium Mobile (iOS and Android) is a separate, simplified app: it’s free to download on both platforms, with core sky-identification features included at no cost. An optional Stellarium Plus in-app purchase (offered as either a one-time payment or a subscription) unlocks the full Gaia star catalog with well over a billion stars, millions of additional galaxies and nebulae, deeper magnitude limits, offline data, and telescope control over WiFi for GoTo mounts using NexStar, SynScan, or LX200 protocols.
Which One Should You Actually Pick
If you’re new to stargazing and just want to point your phone at the sky and identify what you’re looking at, Stellarium Mobile’s free tier or SkySafari’s low-cost Basic tier will cover you — either works fine without a telescope. If you’re planning to observe or photograph specific targets in advance, Stellarium’s desktop app is hard to beat since it’s free and lets you rehearse a session on a full-size screen before heading outside.
If you own a telescope — especially a GoTo or computerized mount — SkySafari Pro is generally the better investment. Its telescope-control protocol support is broader on mobile, it integrates with StarSense Explorer (Celestron’s phone-based alignment system), and its planning/logging tools were built specifically for visual and imaging sessions. Stellarium can also drive a mount through its desktop plugin system or the Mobile Plus WiFi feature, but it’s less purpose-built for in-the-field telescope operation than SkySafari.
Many experienced observers actually use both: Stellarium on a laptop for pre-session planning and framing, and SkySafari on a phone in the field for real-time telescope pointing and object logging.
Tips / Common Mistakes
Don’t buy SkySafari Pro before checking whether your telescope’s mount actually supports one of its listed protocols (ASCOM, INDI, SkyFi, Celestron WiFi, or StarSense Explorer) — if it doesn’t, a cheaper tier will do everything you need. Similarly, don’t pay for the Stellarium Plus in-app upgrade just for extra stars if you mainly stargaze with the naked eye or binoculars; the free tier’s default catalog already covers everything visible without optical aid.
Remember that Stellarium’s free desktop app and its mobile app are different products from different codebases with different feature sets — reviews of one don’t necessarily apply to the other. Both are free to download on iOS and Android, so don’t assume you need to pay upfront just to try Stellarium Mobile. Finally, grant location and GPS permissions when you first open either app — an inaccurate location is the most common reason the displayed sky doesn’t match what you’re actually seeing outside.
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SkySafari vs Stellarium FAQs
Is Stellarium completely free?
The desktop version (Windows, macOS, Linux) is free and open source. The mobile app (iOS and Android) is also free to download, with an optional Stellarium Plus in-app upgrade for expanded star catalogs and telescope control.
Does SkySafari require a subscription?
No — the core app (Basic, Plus, or Pro) is a one-time purchase per tier. SkySafari Premium is an optional add-on subscription that adds extra content on top of any SkySafari 7 or 8 app.
Which app has better telescope control?
SkySafari, particularly the Pro tier, supports the widest range of telescope protocols on mobile (ASCOM, INDI, SkyFi, Celestron WiFi, StarSense Explorer). Stellarium supports mount control mainly through its desktop plugin system, or via WiFi in Stellarium Plus for select GoTo protocols.
Can I use SkySafari and Stellarium together?
Yes — a common workflow is planning and framing a session on Stellarium’s free desktop app, then using SkySafari on a phone in the field for real-time pointing and telescope control.
Which app is better for beginners with no telescope?
Either free tier works well. Stellarium Mobile’s free version and SkySafari Basic both let you identify stars, planets, and constellations by pointing your phone at the sky, without needing to buy anything.
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Images: SkySafari Astronomy.