pbchess (aka "chess - tactics and strategy" on Google Play) is my own chess program. You can use a lot of chess training bases with tactics, endings, annotated games with pbchess. Computer analyse is also available in the latest version.
Download the "chess - tactics and strategy" application from Google Play.
I also have Windows/MacOS/Kindle/Kobo version.
Learn more at my site: http://pbchess.vlasovsoft.net/en