Language Dex suits learners who prefer to build their own word lists instead of following a fixed course. It is an Android app by Arthur Cosentino, listed under language-learning apps. Version 0.32.1 is the build covered here.
Free, no ads and open source under GPL-3.0
The app is free and carries no advertising. It is tagged open-source and no-ads, and the code is released under GPL-3.0-only, with the source published on GitHub.
Custom dictionaries, a text reader and recall puzzles
Every word is entered by you. For each entry you can set the part of speech, definitions, examples and pronunciation, and you can revise a definition as your understanding improves.
A reader lets you paste an excerpt, see definitions you already saved and add new words from the text. Puzzles then test knowledge, spelling and recall. You can set a confidence level per word, which changes how often it shows up in practice games. There are also language stats you can share with friends.
Release history and file details for 0.32.1
The app was first released on November 17, 2025, and the latest update is dated October 25, 2026. The package ID is dev.arthurcose.languagedex.
The download is 50.8 MB and requires Android 7.0 or newer. The current version is 0.32.1, and a number below 1.0 suggests the app is still maturing.
Language Dex pros and cons
Pros
- Free with no ads
- Open source under GPL-3.0-only, with a public GitHub repository
- Per-word confidence levels change how often words appear in practice
- Reader tool matches pasted text against your saved definitions
- Runs on Android 7.0 and newer
Cons
- You must write every definition yourself, so there is no ready-made course
- 50.8 MB is sizable for a vocabulary tool
- Version 0.32.1 is still below 1.0
- Google Play rating and install figures are not shown here
Is Language Dex safe?
The APK is kept unmodified, and its SHA-256 checksum is 151e02b669d018f5623b9a7995599ce535654378fb8d07894377eaffcc0b882d, so you can compare it with your download. Language Dex comes from developer Arthur Cosentino under GPL-3.0-only, and the code behind its custom dictionaries and word puzzles is public at https://github.com/arthurcose/language-dex. It has no ads and costs nothing. No permission list is included in our data, so check what Android asks for at install time.
How to install Language Dex
- Download the APK with the button on this page and wait for it to finish.
- Compare the file with the SHA-256 checksum shown here if you want to confirm it arrived intact.
- Open the file on your phone and allow installs from this source when Android asks.
- Finish the install, then open Language Dex from your app drawer.
