| Core Identity |
| Developer | Zluck Solutions | Appelio | in a nutshell - kurzgesagt GmbH | Vito Technology Inc. | Terminal Eleven LLC | GamifyIt | Knowledge Diffusion | StudySwitch, Inc. | JSDT SOLUTIONS | iNaturalist |
| Category | Education | Education | Education | Education | Education | Education | Medical | Education | Education | Education |
| Platform | Android, iOS | Android, iOS | Android, iOS | iOS, Android | Android, iOS | iOS | iOS, Android | Android, iOS | Android | iOS, Android |
| Store Metrics |
| Rating | 5.0 / 5 | 4.7 / 5 | 4.9 / 5 | 4.7 / 5 | 4.6 / 5 | 4.8 / 5 | 4.9 / 5 | 4.7 / 5 | 4.5 / 5 | 4.8 / 5 |
| Ratings Count | 2 | 33 | 2,499 | 66,644 | 7,634 | 292 | 872 | 15,718 | 1,898 | 30,771 |
| Price | Free | Free | $2.99 | $2.99 | $2.99 | $5.99 | Free | Free | Free | Free |
| Release Date | May 30, 2020 | Nov 26, 2025 | Sep 20, 2020 | Aug 21, 2014 | Dec 10, 2010 | Feb 6, 2014 | May 3, 2022 | May 25, 2022 | Apr 18, 2018 | Mar 9, 2018 |
| Last Updated | May 30, 2020 | Apr 14, 2026 | Nov 10, 2025 | May 12, 2026 | May 2, 2025 | May 18, 2026 | Mar 27, 2026 | Apr 24, 2026 | Apr 25, 2026 | Apr 10, 2026 |
| Sentiment & Reviews |
| Sentiment | - | excellent | excellent | mixed | - | excellent | mixed | - | - | negative |
| Score | - | 85/100 | 85/100 | 65/100 | - | 95/100 | 45/100 | - | - | 35/100 |
| Praises | - | - 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
| - Educational scale visualization provides a calming and perspective-shifting experience for science enthusiasts
- Ad-free experience and donation-based model foster deep user trust and appreciation
- High-quality artistic style and animation keep users engaged during long exploration sessions
| - Educational depth regarding astronomical objects provides significant value for novice stargazers and hobbyists
| - | - Educational scale exploration provides deep perspective on the universe from subatomic to cosmic levels
- High quality audio narration and voice options improve the accessibility of complex scientific information
- Monetization model remains user-friendly with no intrusive advertisements or subscription requirements
| - Educational video content provides deep conceptual explanations that supplement classroom learning effectively for students
| - | - | - Gamified nature exploration challenges provide a compelling incentive for users to get outdoors
- Live camera identification provides immediate educational value for users exploring local natural environments
|
| Complaints | - | - Inaccurate celestial positioning and calibration issues frustrate users following the latest update
- Performance lag and instability on tablet devices disrupt the viewing experience
| - Application launch failures and immediate crashes on specific mobile hardware post-update
- Outdated scientific facts and missing celestial objects diminish the educational accuracy
| - Inaccurate sky tracking and compass calibration issues prevent reliable identification of celestial objects
| - | - Minor typographical errors in object descriptions distract from the otherwise high quality educational content
| - Offline video playback functionality fails to load content despite successful downloads on mobile devices
| - | - | - Camera performance regressions following the latest update cause frequent freezing and application crashes
- Inaccurate species identification model frequently misclassifies common organisms as unrelated species or broad categories
- Loss of historical observation data following reinstallation or update cycles frustrates long-term users
|
| Requests | - | - Landscape orientation support for tablets would improve the usability of the sky map
- Camera overlay functionality would help users match digital maps to physical celestial bodies
| - Audio narration of descriptions would improve accessibility for younger children and visually impaired users
- Interactive sandbox mode for direct size comparison between multiple selected objects
| - Weather forecast integration for stargazing would provide practical utility for planning observation sessions
| - | - Expanded language support for non-English speakers to improve accessibility for international families
- Additional astronomical objects and scientific phenomena to broaden the scope of the zoom experience
| - AirPlay or dedicated television app support is required for viewing content on larger screens
| - | - | - Cloud synchronization for observation data to prevent permanent loss during app reinstallation
|
| Strategic Intel |
| Strengths | - Exam-specific categorization functions as a distribution moat into high-stakes entrance exam preparation.
- Tablet-optimized interface sustains usability for long-form study sessions.
| - Open-source community model reduces R&D costs
- Ad-free interface creates high trust with casual users
- Long-term utility builds multi-year retention
| - High-fidelity artistic style creates a unique educational environment
- Kurzgesagt brand authority drives organic conversion
- Ad-free model builds long-term user trust
| - AR-driven interface lowers the barrier to entry for casual users
- 3D model depth functions as a brand moat for educational utility
| - | - Scale comparison engine functions as a brand moat, justifying the $5.99 upfront price.
- 21-language library functions as a B2B distribution barrier into international school partnerships.
- Ad-free experience builds high user trust, sustaining a 4.85 rating.
| - Animated video library condenses complex pharmacology into 10-minute visual summaries
- Quiz Builder increases active learning frequency
- Elsevier-backed content authority builds professional trust
| - | - | - Proprietary identification model derived from global community observations
- Privacy-first architecture lowers initial friction for families
- Non-profit status builds high institutional trust
|
| Weaknesses | - No interactive simulations or video content despite student preference for visual learning.
- Static content library lacks the engagement loops found in gamified rivals.
| - 0.52★ Android-iOS rating gap indicates platform-specific instability
- Calibration errors post-update drive churn
- No landscape orientation support for tablets
| - Immediate launch crashes on newer hardware
- Outdated scientific data
- Lack of audio narration for accessibility
| - Compass calibration failures persist across devices
- Monetization structure creates friction post-purchase
| - | - One-time purchase model limits recurring revenue compared to subscription-based competitors.
- Typographical errors in descriptions distract from the high-fidelity scientific content.
- Lack of real-time sensor integration limits interactivity compared to Stellarium Mobile.
| - Offline playback failure on mobile devices
- Question bank restricted to desktop
- Incomplete institutional database blocks new user registration
| - | - | - Local-only data storage causes permanent loss for users
- Camera stability regressions in the latest update
- Identification model frequently defaults to broad categories
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| Pricing | free | free | freemium | paid | paid | paid | subscription | freemium | free | free |
| Momentum | Zombie | Active | Zombie | Maintenance | Maintenance | Maintenance | Intense | Intense | - | Maintenance |
| Update Cadence | 2 versions, ~2136d avg | 3 versions, 1 majors/6mo, ~7d avg | 2 versions, ~643d avg | 4 versions, 2 majors/6mo, ~28d avg | 5 versions | 2 versions, 2 majors/6mo, ~77d avg | 5 versions | 5 versions | - | 5 versions, ~8d avg |
