Star Gazer & Night Sky Map is an open-source astronomy tool for identifying celestial objects on iOS and Android.
Product velocity
Active
Daily rank 🇺🇸
#106
▼16Education · free
Sentiment
4.2
485k reviews
Nemesis
Stellarium Mobile - Star Map
The App DNA
What makes this app unique?
Users hire this app for a low-friction, ad-free way to explore the night sky without the commercial overhead or complex data-heavy interfaces of paid competitors.
For Astronomy enthusiasts and curious beginners looking for a free, ad-free tool to identify celestial objects.
What does it look like?
Key features
Identifies stars, planets, and constellations by pointing the device at the sky using sensor data
Includes images and information for deep sky objects, recently expanded with new catalog entries
Allows users to search for specific celestial bodies, including moons of Jupiter and Mars, with dedicated info cards
Maintained as an open-source project with community contributions via GitHub
How much does it cost?
The app operates as a non-profit, ad-free, and open-source project supported by community donations via Buy Me a Coffee.
Velocity
Active developmentnew contentUX improvementsperformanceShow more...
The app ships approximately 0.23 releases per week, averaging one update every 2-3 weeks. Development is currently stable, with the latest release providing significant feature additions rather than just maintenance. The team is actively expanding the app's utility through UI redesigns and content updates, moving beyond simple performance patches. This cadence indicates a healthy, feature-focused development cycle.
Who built it?
Appelio
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What do users think recently?
Recent user voice shows a thrilled sentiment. Users appreciate long-term reliability of the sky mapping tool keeps users engaged over many years and lean and ad-free interface provides a focused experience for identifying celestial objects, but report inaccurate celestial positioning and calibration issues frustrate users following the latest update.
How are ratings & reviews evolving?
What users say, by theme
- Long-term reliability of the sky mapping tool keeps users engaged over many years
- Lean and ad-free interface provides a focused experience for identifying celestial objects
- Open source nature fosters a sense of community and genuine labor of love
- Inaccurate celestial positioning and calibration issues frustrate users following the latest update
50 of 50 recent reviews analyzed · high confidence · Thrilled overall
Read the full review analysisUnlock 1 more frustration theme and 2 user requests, each backed by review evidence.
Access the full report for freeCompetition
Competitive landscape for Star Gazer & Night Sky Map
How's the Education market?
The app holds a consistent presence in the Books & Reference category across global markets, though its #80 rank in the US indicates high competition for casual discovery. The gap between its free-tier reach and the lack of monetisation signals a focus on community utility over revenue growth.
Read the market outlookThe rivals identified
By Noctua Software Ltd
With over 300,000 ratings and a highly specialized focus on astronomical accuracy, this app dominates the core stargazing niche.
- Provides professional-grade astronomical data and precise celestial object tracking for advanced users.
- Maintains a consistent release cadence that ensures compatibility with the latest mobile hardware updates.
- Offers a deep, data-rich interface that caters to serious amateur astronomers rather than casual observers.
Night SkyContender
Star Walk 2 Pro: Sky Map LiveContender
Sky Tonight - Star Gazer GuideContender
SkyView® LiteContenderUnlock the head-to-head verdict: where this rival wins, and where it loses.
Access the full report for freeThe Analyst's Read
Key takeaways for Star Gazer & Night Sky Map
Where is it heading?
The casual stargazing market is consolidating around apps that offer high-fidelity AR and event-based planning, putting pressure on static map tools. The app remains advantaged by its ad-free status, but the recent calibration regressions must be resolved to prevent users from migrating to more stable, update-frequent competitors.
- Calibration errors in the latest update drive user frustration, which risks eroding the high trust built over years of consistent performance.
- The open-source development model continues to attract community contributions, ensuring the app remains a viable, ad-free alternative to commercial stargazing tools.
The SWOT
- Open-source community model reduces R&D costs
- Ad-free interface creates high trust with casual users
- Long-term utility builds multi-year retention
- Implement camera overlay to match digital maps to physical sky
- Expand tablet-specific UI to capture larger-screen usage
- Formalize B2B educational partnerships
Next best moves
Audit sensor calibration logic because post-update directional errors are the top complaint → stabilize user trust
+ 1 more prioritized moveThe counter-intuitive read
The app's lack of monetization is its primary competitive advantage…
Read the full takeFeature gaps
Professional-grade astronomical data (available in Stellarium Mobile) +2
Since the last report: The app has evolved into an open-source, community-led project with expanded catalog depth, but recent updates have introduced calibration and performance regressions that negatively impact user sentiment.
Bottom line
The app maintains high retention through its ad-free, community-driven utility, but recent calibration regressions threaten its long-term trust, so the PM must prioritize stability over feature expansion to defend its position against update-frequent rivals.
Unlock 3 critical frictions, 3 market threats, 1 more prioritized move and the analyst’s take.
Access the full report for freeReport last updated