There are three options for using TiddlyWiki on Android:

Using Firefox and TiddlyFox

Using the AndTidWiki App

The Tiddloid and Tiddloid Lite app are Android apps that makes it possible to edit and save changes to TiddlyWiki HTML files.

• For more information: Tiddloid Tiddloid Lite.
• Download apks: Tiddloid, TiddloidLite

Features

• Create new TiddlyWiki importing latest edition from internet
• Import existing TiddlyWikis stored on device/internal storage. (TiddloidLite supports external SD card too)
• Fork interesting ~Tiddlywikis from internet (Supports TW5 only)
• TiddlyWiki detection
• Locally stored ~Tiddlywikis are updated simultaneously on saving changes to TiddlyWikis imported to the app
• Backup system that is compatible with TiddlyDesktop, the desktop TiddlyWiki saver
• Creating shortcuts to existing TiddlyWiki on Android Homepage
• TiddloidLite supports cloud storages like GDrive and OneDrive

Please note

• Tiddloid Lite feature better support for devices running Android Q or later. It also supports cloud storages like GDrive and OneDrive, while Tiddloid keeps the compatibility to TiddlyWikiClassic. To know more about differences between Tiddloid and Tiddloid Lite, please visit Tiddloid's homepage.
• You should keep the .html or .htm extension of the files to be imported.

Using Node.js in Termux

Termux is and open source android application providing limited Unix environment enabling users to install Node.js and npm modules in android. Users can install and run TiddlyWiki on Node.js using Termux.

Instructions

• Download and install Termux from Google Play Store or Fdroid
• Open termux and run the following commands one by one

apt update
apt upgrade
apt install nodejs
npm install -g tiddlywiki

• If you need to create/serve TiddlyWiki on Node.js from the internal storage, you need to give termux storage permission by running the following command in termux

termux-setup-storage

• Now you can create and serve TiddlyWiki on Node.js from internal storage. In the example given below, user is creating a new wiki called "mynewwiki" in his internal folder.

cd storage/shared
tiddlywiki mynewwiki --init server
tiddlywiki mynewwiki --listen

• Visit http://127.0.0.1:8080/ in your browser
• From then on, as long as Termux is not closed, you may access your wiki anytime from your favourite Web browser pointing on the expected address and port.

• For more information regarding TiddlyWiki on Node.js, please see Installing TiddlyWiki on Node.js
• For more information and tips regarding termux, please refer to Termux wiki