Best chess apps to prepare for online tournaments
Tactics, time management, opening prep against expected opponents.

Chess.com
Chess.com, LLC
The default home of online chess.
Free · from $4.17/mo
4.5Web · iOS · Android

ChessAtlas
ChessAtlas
Build an opening repertoire that survives spaced repetition.
Free · from $6.99/mo
Web

DarkSquares
DarkSquares
Blindfold chess training, broken into 7 progressive levels.
Free · from €29 one-time
Web · iOS · Android

Aimchess
Aimchess (Chess.com group)
AI that finds your chess weaknesses and drills them.
Free · from $7.99/mo
4.1Web · iOS · Android

Arena Chess GUI
Martin Blume
Veteran free GUI for running 250+ chess engines.
Free
Windows · Linux

CT-ART 6.0
Convekta Ltd. (ChessOK)
The classic tactics trainer, now multi-platform.
From €24.99 one-time
Web · iOS · Android

Chess King Learn
Chess King (CHESSQUEEN INC, ex-Convekta)
Huge Convekta course catalog in one app.
Free
4.8Web · iOS · Android

Chess Position Trainer
Stefan Renzewitz
Veteran flash-card repertoire trainer for desktop.
Free
Windows

Chess Tempo
Chess Tempo
The serious puzzle grinder's tool.
Free · from $3.50/mo
4.7Web · iOS · Android

ChessMood
ChessMood
GM-led video courses plus live coaching community.
From $79/mo
Web