In chess a winning game plan starts with the first move. The goal in the opening of a chess game is to reach a good position with which you are comfortable. It doesn't matter how creative you may be in the middle game or endgame if you lose the opening.

This app is designed to help you create a complete chess opening plan and train to execute it. It uses an advanced memorizing technique called "spaced repetition" which focus on your weaknesses.
The app is able to identify the positions for which you are having problems and helps you to correct these weaknesses by using an effective pattern of repetitions.

The concept is very simple and easy to use: you select and enter only one move for you own color (your move) and then you enter all possible moves of your opponent in response to your move.
Please note this app is not a PGN viewer it's a training tool. Many apps already exist to explore chess openings variants but it's not the purpose of this app.
This app will rather help you to execute your opening plan. The perfect execution of this plan will give you a serious advantage against any opponent.

If you prefer you can buy the pro version:
https://play.google.com/store/apps/details?id=com.beadapps.chessrepertoiretrainer.paid

A quick reference guide is available here:
https://beadappshelp.wixsite.com/chess

Main features:

♞ Ability to create folders and segregate openings in an organized way.

♞ Built-In chess engine (Stockfish) to help you find the best moves for your openings!

♞ Optionally resume playing against the chess engine when you reach the last position of an opening line.

♞ PGN files import (moves and comments) ideal chess book companion.

♞ Export your openings to PGN file format (pro version only).

♞ Automatic identification of your openings using the encyclopedia of openings (ECO).

Several training modes possible.
♞ target weaknesses:
The computer simulates opponent moves based on your scores and targets your weaknesses.
♞ full coverage:
The computer simulates opponent moves sequentially and ensures to cover all possible paths of your repertoire.
♞ random:
The computer simulates opponent moves based on the probability of occurrence of each move during a game.
♞ flash cards:
The computer select random positions from your openings based on your weaknesses using the spaced repetition concept.

♞ Ability to backup your repertoire restore it on another device or share it with your friends !

Notes:
(*)
1) PGN import is limited to 8 moves per game in free version
2) The program Stockfish is responsible for the intelligence of the chess play and can be found here:
https://stockfishchess.org/
The Chess Repertoire Trainer user interface and the Stockfish chess engine are strictly separated.