Android

Android is tricky in general. There are restrictions due to Androids storage access measurements.

Dory Node JS for Android

Playstore: https://play.google.com/store/apps/details?id=io.tempage.dorynode
Github: https://github.com/tempage/dorynode

Apache Cordova (more complex then installing Termux, but stable)

Mobile apps with HTML, CSS & JS
Target multiple platforms with one code base
Free and open source

Website: https://cordova.apache.org/
Tutorial: https://cordova.apache.org/docs/en/11.x/guide/cli/index.html

You can easily run NodeJS apps on an Android phone with Termux (NOTICE: Termux is broken on Android 10-12, fix in progress)

Termux is an Android terminal emulator and Linux environment app that works directly with no rooting or setup required. A minimal base system is installed automatically - additional packages are available using the APT package manager.

APK: https://f-droid.org/en/packages/com.termux/

Setup

Here is a simple gun relay server.

Start a new repo:

// server.js

;(function(){
  var gun = require('gun/examples/http');
  if(!gun.back){ return } // http example auto spawns subprocess

  var fs = require('fs');
  var server = gun.back('opt.web');
  var route = server.route = {}

  fs.readdir('./route', function(err, dir){
      if(err || !dir){ return }
      dir.forEach(function(file){
          if(!file){ return }
          route[file.split('.')[0]] = require('./route/'+file);
      });
  });
 
// with this line you can type a message on http://localhost:8765/basic/paste.html and check if the server works.
  gun.get('test').on(data => console.log(data))

}());

-npm gun
-npm start