Life & fun · alternatives · 2026
24 alternatives to Gravity/
Test create celestial bodies warp the fabric of space-time..
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier. Gravity/ launched in 2017; newer entries below may have overtaken it.
- 1GI
Just for fun and self education, I've built this over a weekend to teach myself why orbits exist, not just show planets going around. Something that was never clearly explain to me in school. It opens with a guided tour that builds the idea up step by step: two bodies and the equal/opposite force, inertia (the Sun is removed and Earth just drifts straight), then "an orbit is falling and continuously missing," cosmic velocities with a little rocket, Voyager 1 & 2's real gravity assists (the clock runs the actual 1977–1989 dates so the planets orbit into their grand-tour alignment and the…
Jun 2026 · qunabu.github.io · its alternatives →
- 2
Atlas of Spacefree▲770Hello HN! Sharing a recent side project of mine, the Atlas of Space, that I built out to explore the Solar System. As a long-time space nerd, I realized recently that I didn't have a good intuition on the scale, speed, and relative orientation of the celestial bodies around us. So over the break I built out a kind of spatial Wikipedia to click around and learn about planets, moons, asteroids, and other bodies orbiting the Sun. The physics is all simulated in the browser using simple Newtonian mechanics. There's a lot left to do from here, including modeling objects in non-Keplerian orbits…
2025 · atlasof.space · its alternatives →
- 3
- 4
Gravity WebGL experiment in the Solar System
2016 · github.com · its alternatives →
- 5HO
3D gravity and space Simulator. Explore and play around with the force of gravity in the context of an array of scenarios from our solar system and beyond. You can add planets, delete the Sun, change the value of the gravitational constant or simply lean back and enjoy the dazzling beauty of the pen
2018 · thehappykoala.github.io · its alternatives →
- 6
PixelSpace▲68A tediously accurate scale model of the solar system
2014 · joshworth.com · its alternatives →
- 7
Google Translate for engineers working with motion
2017 · google.github.io · its alternatives →
- 8
Gravity 8▲212Build a SaaS app at warp speed with a Javascript boilerplate
2021 · usegravity.app · its alternatives →
- 9
- 10
- 11
Metric▲69Shoot for the stars in this gravity-based physics puzzler!
2017 · apps.apple.com · its alternatives →
- 12IB
2022 · multiplanetary.website · its alternatives →
- 13
- 14
- 15
Spatium▲182Hi there, humans! I'm excited to announce Spatium! I'm a big fan of any topic related to our universe. I'm also a developer, so I've put these things together and I built this new tab Chrome Extension for space lovers, astronomy fans, and science geeks like me. If you enjoyed it, please spread some love <3 FEATURES • Space images • Every day, get a fascinating image of our universe. Enjoy pictures of stars, planets, moons, galaxies, nebulae, comets and more right on your browser tab. • Sun Widget • Find out when the sunrise, sunset, first and last light times will be precisely at your…
2021 · spatium.earth · its alternatives →
- 16
- 17IB
Mar 2026 · structuredlabs.github.io · its alternatives →
- 18
Gravity Sketch▲154An app to easily create 3D models by sketching
2016 · gravitysketch.com · its alternatives →
- 19
Evolution, Theoretical Physics and Computer Science
2015 · amazon.com · its alternatives →
- 20
A gravity simulator, with updated movement controls
2016 · valentinvichnal.github.io · its alternatives →
- 21
Elude!▲61Slide the spaceship and elude obstacles at warping speed!
2015 · apps.apple.com · its alternatives →
- 22
Build a solar system that doesn't blow up from gravity
2016 · stefanom.org · its alternatives →
- 23
AstroGrid▲113Explore the entire universe in your browser, in real 3D
Apr 2026 · velonspace.com · its alternatives →
- 24
Also compare
Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →