The character editor TECO-C is another program I like that was originally written in assembly. This is a 153k static-pie binary ("non-video")

https://codeload.github.com/blakemcbride/tecoc/zip/refs/head...

Also forgot to mention that TextMaker on Android contains networking code and will try to connect to the internet. This is can be blocked with Netguard app, GrapheneOS, netfilter/pf/etc. on a gateway controlled by the user, or whatever other solution for blocking connections that the user prefers.