AstroCalc Pro: Astro Tools

AstroCalc Pro is your all-in-one astronomy calculator and learning toolkit — built for students, teachers, astronomy enthusiasts, and anyone curious about the universe. No internet connection needed, no ads, no clutter. Just powerful space science tools in your pocket.

🪐 PLANET CALCULATORS
Find your weight on any planet or moon, calculate surface gravity, and work out escape velocity for every body in our Solar System — from Mercury to Pluto.

🚀 ORBIT CALCULATORS
Calculate orbital velocity, orbital period, and explore circular orbit mechanics using real physics formulas like Kepler's Third Law.

⭐ STELLAR CALCULATORS
Work with distance modulus, redshift, luminosity, and other tools used to study stars and galaxies.

🌌 SPACE CONVERTERS
Convert between length, mass, velocity, and time units common in astronomy — light years, parsecs, astronomical units, solar masses, and more.

📚 FORMULA LIBRARY
A complete reference of 12 core astronomy formulas, each with a clear explanation, variable definitions, units, and a worked example — including Newton's Law of Gravitation, Escape Velocity, Kepler's Third Law, the Schwarzschild Radius, and more.

🧮 SCIENTIFIC CONSTANTS
Quick access to fundamental physical constants — the gravitational constant, speed of light, Planck constant, Boltzmann constant, and more — each with a short description.

📖 LEARN ASTRONOMY
12 bite-sized lessons covering the Solar System, planets, stars, galaxies, nebulae, black holes, exoplanets, comets, asteroids, meteor showers, constellations, and space missions — plus fun interactive quizzes to test what you've learned.

📝 HISTORY & ⭐ FAVORITES
Every calculation is automatically saved to your history so you can revisit it anytime. Pin your favorite formulas and star your most-used calculations for quick access.

⚙️ CUSTOMIZABLE EXPERIENCE
Switch between light and dark themes, toggle scientific notation, and adjust decimal precision to match exactly how you like your results displayed.

🔒 100% OFFLINE & PRIVATE
AstroCalc Pro works entirely on your device. There's no internet requirement, no account sign-up, no ads, and no data collection — your calculations and history stay private, stored only on your own phone.

Whether you're a student tackling astrophysics homework, a teacher looking for a quick classroom reference, or simply someone who loves looking up at the night sky and wondering "what if," AstroCalc Pro brings the cosmos' math down to Earth — accurately, beautifully, and completely offline.

Download AstroCalc Pro today and start exploring the universe, one calculation at a time.