Chessis: Chess Analysis

Name: Chessis: Chess Analysis
Author: Chess Improvement Apps

21.5

Play Protect

Chess Improvement Apps

4.651M+ installs

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Analyze your games with Stockfish 19, learn from mistakes & play smart bots

Chessis: Chess Analysis, Stockfish reviews and bots

By Priya Raghavan

Senior reviews editor

Full game report with accuracy and an estimated rating
Move badges from Brilliant to Blunder, with the missed idea shown on the board
Retry Mistakes: replay critical moments and try a different move
Import games from Chess.com, Lichess, PGN files or a camera scan of a board
Bots that play aggressive, defensive or natural styles at each level
Opening explorer with named lines and trap training

Chess game review for players who study their games

Chessis is a chess analysis app built around going back over games that have already been played. It runs the Stockfish 19 engine across a game and presents the result as a lesson, showing which moves helped and which ones cost material or position.

The main audience is players who want to understand their losses rather than just see a final result. The bots and opening material are there for practice between reviews.

Game reports and move badges

Each analysed game gets a report with an accuracy figure, an estimated rating and a breakdown by phase of the game. A separate list of key moments picks out the turning points and explains them in plain language.

Every move carries a badge running from Brilliant down to Blunder. Tapping a Blunder opens a "Why Blunder?" view that shows the idea that was missed, drawn on the board where the move was played.

Retrying mistakes and importing your games

Retry Mistakes returns you to the critical positions from a game so you can look for the stronger move again. The aim is to find the better move yourself rather than read it off the report.

Games can come from Chess.com or Lichess accounts, from PGN files, or from a photo of a physical board scanned with the camera. That means over-the-board games can be reviewed alongside online ones.

Practice games against human-style bots

The bots are set up to play in recognisable human styles: aggressive, defensive or natural, at a range of levels. You can play casually or with a clock.

During a game, blunder alerts warn you before a poor move is made. Hints, takebacks and move-strength feedback are also available, so a game can be used as a learning session rather than a test.

Opening names, main lines and trap practice

The opening explorer lists chess openings by name with their main lines, so you can see the typical continuations for each one.

Trap training drills well-known opening traps repeatedly, letting you practise spotting and playing the right response until it becomes automatic.

What's new

Sep 12, 2026

♟️ Multiple usernames
Add every username you play under on any site, and Chessis will automatically flip the board when your username appears in a PGN game.
Settings > Advanced Settings > Your usernames

Plus bug fixes and small improvements.

About this APK

The build we hold is Chessis: Chess Analysis 21.5 (APKS split bundle) for Android 5.0 and up.

Version: 21.5; 215
Requires Android: 5.0+
Size: 11 MB
Target Android: 16

Package ID: com.chessimprovement.chessis
Format: APKS split bundle
Malware scan: Google Play Protect
Permissions: 19 declared
Signed by: CN=Android, O=Google Inc.
Certificate SHA-256: 80761bbe3ed26934331c18548d795f0d3574c71fcc748abfa3fd5c2bfaa617eb