There used to be an ECL+Maxima app for Android, but it fell in one of the purges of older programs from the Play store a while back. I was always surprised it didn't use ABCL.
Prof. Jaime Villate taught us physics at U. Porto and made heavy use of Maxima. Good times :D
This looks like an open source alternative to Mathematica/MathLab/Maple running in the browser.
Please correct me if I'm off...
As there's no project description that I quickly found, I came to this conclusion myself.
Very cool! Love to see old but still useful GPL licensed FSF projects. I had Maxima on my old Lisp Machine, and 24 years ago when I first interviewed at Google, one of the developers of Maxima was also interviewing and we had a while to talk in the sign in area before going off for our interviews. We were amused that two old Common Lispers were at the same place at the same time.
When you try the linked browser web app, start with the documentation link, fairly easy to use.