| Core Identity |
| Developer | Jeff Weeks | Incpt.Mobis | Khan Academy | Vito Technology Inc. | Noctua Software Ltd | 3HOUSE | Encoder Inc. |
| Category | Education | Education | Education | Education | Education | Education | Education |
| Platform | iOS, Android | Android, iOS | iOS, Android | iOS, Android | iOS, Android | iOS, Android | iOS, Android |
| Store Metrics |
| Rating | 4.6 / 5 | 4.7 / 5 | 4.6 / 5 | 4.7 / 5 | 4.8 / 5 | 4.7 / 5 | 4.9 / 5 |
| Ratings Count | 10 | 6,228 | 105,047 | 66,644 | 35,790 | 155,399 | 12,085 |
| Price | Free | $5.99 | Free | $2.99 | Free | Free | Free |
| Release Date | Feb 24, 2018 | Sep 16, 2011 | Mar 11, 2012 | Aug 21, 2014 | Apr 7, 2019 | May 30, 2023 | Apr 11, 2021 |
| Last Updated | Sep 4, 2020 | Mar 12, 2026 | Feb 24, 2026 | May 12, 2026 | Feb 22, 2026 | Apr 7, 2026 | Apr 11, 2026 |
| Sentiment & Reviews |
| Sentiment | excellent | mixed | positive | mixed | - | - | - |
| Score | 90/100 | 45/100 | 78/100 | 65/100 | - | - | - |
| Praises | - Diverse geometry and game variety provide high replay value for casual puzzle enthusiasts
| - Core calculator functionality provides reliable and accurate math results for daily user tasks
| - High-Quality Free Education
- Effective Learning Content
| - Educational depth regarding astronomical objects provides significant value for novice stargazers and hobbyists
| - | - | - |
| Complaints | - | - Removal of the running total display post-update forces unnecessary interaction with the equals button
| - Login and Authentication Issues
- Technical Performance and Bugs
| - Inaccurate sky tracking and compass calibration issues prevent reliable identification of celestial objects
| - | - | - |
| Requests | - Expansion of the game library to include classic titles like minesweeper and chess
| - Addition of scientific calculator functions and currency conversion tools to increase utility
| - | - Weather forecast integration for stargazing would provide practical utility for planning observation sessions
| - | - | - |
| Strategic Intel |
| Strengths | - NSF funding provides a stable, non-commercial foundation
- Unique visualization of non-Euclidean geometry
- High-fidelity mathematical accuracy
| - Textbook-style display mimics physical graphing calculator interfaces
- 2D graphing engine supports simultaneous conic equation plotting
| - Unrivaled free access model with high brand trust
- Advanced AI tutoring integration (Khanmigo)
- Comprehensive, expert-created video and exercise library
| - AR-driven interface lowers the barrier to entry for casual users
- 3D model depth functions as a brand moat for educational utility
| - Scientific accuracy derived from open-source heritage sustains high user trust
- Telescope control protocols create high switching costs for hobbyists
- Minimalist UI reduces cognitive load for casual stargazers
| - | - |
| Weaknesses | - Zero-marketing budget limits user acquisition
- Lack of structured curriculum for students
- No cross-platform progress syncing
| - Removal of running total display post-update
- UI regressions post-update increase perceived clutter
- Intermittent crashes disrupt active math workflows
| - Critical authentication and login stability issues
- Mobile app performance and latency compared to web
- Less granular skill tracking than commercial rivals like IXL
| - Compass calibration failures persist across devices
- Monetization structure creates friction post-purchase
| - Premium tier lacks cross-platform notification parity
- No wearable integration limits active outdoor engagement
- Android-iOS rating gap suggests inconsistent performance
| - | - |
| Pricing | free | freemium | free | paid | freemium | free | freemium |
| Momentum | Active | Maintenance | Maintenance | Maintenance | - | Intense | Intense |
| Update Cadence | 5 versions | 5 versions, 3 majors/6mo, ~77d avg | 5 versions, ~93d avg | 4 versions, 2 majors/6mo, ~28d avg | - | 5 versions | 5 versions |
