What is the Elllo English Learning application, how does it work?

According to the introduction of takacs.albert, Elllo English Learning is a Education app on the Android platform. There is currently a 1.30 version released on Mar 20, 2020, you can see the details below.

Unique English learning app providing listening and reading interviews. Real people speaking about interesting topics with authentic accents around the world.

Features
* Available on Android and Windows 10
* Enjoy it on desktop, tablet or phone
* Over 1400 lessons to listen with downloadable audio content
* Pronunciation - Speech test
* Interview transcript
* Offline learning capability
* Inline translation
* Comprehension & Vocabulary test
* Grammar topics
* Videos
* Read aloud text
* Phrasal verbs with over 3200 meanings
* Translate free text
* Reminder
* Voice recording and playback [only on Windows 10]
* Dark theme support [only on Windows 10]

Elllo is the unofficial app for http://www.elllo.org English Listening Lesson Library Online.
There are 1400 (and counting) dialogues available to read, listen and learn. There is also a vocabulary section for each interviews with audio comments. Also many videos are available to watch.
You can practice your understanding by reading the transcript while listening people with various English accents.
Learning offline: the app stores visited lessons, downloaded audio files, and pictures.
The developer does not hold any rights over the content, as it belongs to http://www.elllo.org, and provided unchanged. Users are free to download and use the materials for educational purposes.