What is the 81Dojo (World Online Shogi) game, how does it work?

According to the introduction of 81Dojo, 81Dojo (World Online Shogi) is a Board game on the Android platform. There is currently a 2.1.6 version released on Mar 29, 2020, you can see the details below.

This app is the smartphone version of the online shogi site "81Dojo" (http://81dojo.com) under the patronage of the Japan Shogi Association.
81Dojo is characterized by its unique and advanced functionalities such as the interactive post-game analysis support, very real playing environment including professional byoyomi voice, and the internationalization. Most of those functionalities are copied to this app. 81Dojo stays with you all the time, while you take it with your smartphone to anywhere you go to. Why not take a little break and enjoy some short games at 81Dojo?

(81Dojo is completely free of charge, free download and free playing.)

[Note]
1. If you are not familiar with 81Dojo yet, it is recommended that you first try the web browser version and get used to its unique features and functionalities, before using this mobile app.
2. User account registration can be done via 81Dojo website. (Non-registered users can login with guest account as well.)
3. Any comments, wishes, bug reports to [email protected] would be appreciated. We keep improving the app quality. We would also appreciate your sending ratings and reviews if you find this app satisfactory.

[Disclaimer]
1. 81Dojo has the full responsibility in the development and distribution of this app. The supporting bodies and cooperative bodies of the desktop computer oriented site "81Dojo" will not be liable to any matters related to this app.
2. In no event shall 81Dojo be legally liable to the user for any matters arising out of using this app.

[Special thanks to]
* piecodesign (http://piecodesign.jp/)
* www.otosozai.com - ONGAKUSITU (http://www.otosozai.com/)
* National flag and Road sign Mt. (http://nflagrsign.xrea.jp/)
* Moeru-Chess-Clock (https://www.amazon.co.jp/dp/B005HGJ3E6)

ver 2.2.1
- Added new handicaps

ver 2.2.0
- Improved speed by reducing traffic

ver 2.1.6
- Rating threshold for the ranks were changed.
- Player lists are divided into tabs to relieve CPU load.

ver 2.0.9
- Auto-pairing mode is added

ver 2.0.0
- Full renewal. All features of the desktop browser version is covered, including participation in rated games and tournaments, optional byoyomi voices and piece graphics.