Life & fun · alternatives · 2026
24 alternatives to Metric
Shoot for the stars in this gravity-based physics puzzler!
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Metric launched in 2017; newer entries below may have overtaken it.
- 1
Solve the physics puzzles to guide the ball to the cup.
2018 · its alternatives →
- 2LL
2018 · github.com · its alternatives →
- 3AOAtlas of Space▲770
Hello 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 →
- 4
My first physics based gravity space ship simulator :)
2021 · its alternatives →
- 5DF
Domino fit is a domino tiling puzzler I spent a lot of time both making and playing. Its like sudoku but with a geometric angle, the sum of the dots must match the row and column numbers. It's running on Betsy, the server under my couch, and was made with typescript. I'm proud of it. I hope you give it a shot, and appreciate any thoughts or criticisms!
2024 · dominofit.isotropic.us · its alternatives →
- 6RA
2021 · ramp-book.com · its alternatives →
- 7
- 8
- 9GI
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 →
- 10
- 11
- 12IB
2022 · multiplanetary.website · its alternatives →
- 13
Google Translate for engineers working with motion
2017 · its alternatives →
- 14
- 15
- 16
- 17
- 18EA
Hi HN, I made this small game in my spare time. It's quite addictive, I spent a lot of hours playing instead of polishing it. My own highscore is 96,792. Source code is at https://github.com/MikeBellika/tile-game. It's made with react, tailwind, and framer motion. Hope you enjoy!
2024 · bellika.dk · its alternatives →
- 19
- 20
Make equations, gather points, have fun, improve math skills
2021 · its alternatives →
- 21
- 22IB
I built this because measuring my age in years felt boring—I wanted to see the kilometers. The first version only used Earth's orbital speed (~30km/s), but the number moved too slowly. To get the "existential dread" feeling, I switched to using the Milky Way's velocity relative to the CMB (~600km/s). The math takes some liberties (using scalar sum instead of vector) to make the speed feel "fast," but it gets the point across. Under the hood, it's a single HTML file with zero dependencies. No React, no build step. The main challenge was the canvas starfield—I had to pre-allocate the…
Jan 2026 · cosmic-odometer.vercel.app · its alternatives →
- 23
- 24
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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 →