PicoLisp is running now on Android, directly installable in Termux!
Termux is a great terminal emulator and Linux environment, see
I'm using it exclusively on my tablet to run bash, vim, ssh - and now
also PicoLisp. Termux comes with an 'apt' package manager which allows
$ apt update
$ apt install vim
$ apt install picolisp # Gives pil32
Since yesterday, even pil64 is supported (on ARMv8 devices), though not
yet via the package manager. Instead, you can do directly:
$ wget http://termux.com/picolisp-15.11_aarch64.deb
$ dpkg --add-architecture aarch64
$ dpkg -i picolisp-15.11_aarch64.deb
But pil32 also runs correctly on 64-bit hardware out of the box.
Before I found Termux, I planned to write a full-blown Android app to
get a frontend for the REPL. That's not necessary any longer :)