Hi, you can run 32-bit (armhf) apps on a 64bit Debian/Ubuntu with multi-arch support. First you have to find out which libraries the binary links against, for example with ldd:
Once you know what libraries are needed, you can install the armhf versions of those on your 64bit system, but you need to install all the dependencies, depending on what is required, that can be a lot for a graphical application...
https://wiki.debian.org/Multiarch/HOWTO
Code:
gentoo@Pine64 /usr/bin $ ldd unzip
linux-vdso.so.1 (0x0000007f7a826000)
libbz2.so.1 => /lib64/libbz2.so.1 (0x0000007f7a7dc000)
libc.so.6 => /lib64/libc.so.6 (0x0000007f7a69a000)
/lib/ld-linux-aarch64.so.1 (0x0000007f7a7fc000)
Once you know what libraries are needed, you can install the armhf versions of those on your 64bit system, but you need to install all the dependencies, depending on what is required, that can be a lot for a graphical application...
https://wiki.debian.org/Multiarch/HOWTO
Come have a chat in the Pine IRC channel >>