Frank Lab Frank Lab
Frank Lab builds focused iPhone puzzle products for players who want logic, learning, and a quieter experience than ad-heavy game loops.
Technique-first Sudoku learning
Learn the reasoning behind each move, from singles to X-Wing, with technique guides and guided iPhone practice.
Stuck on a Sudoku? Try one explained move →
Calm picture-logic puzzles
Solve nonograms with beginner-friendly guidance, undo-first recovery, local progress, and no pressure loops.
New to picture logic? Learn how to solve nonograms without guessing →
A first chess discovery
Learn the knight’s L-shaped jump, try one move with feedback, then explore pass-and-play or a practice bot on the existing Kid Chess Playroom board.
Try the web chess lesson →The iPhone app is not publicly available yet.
Try a Single Candidate in Sudoku, compare legal clue placements in Nonogram, or make a knight’s first move in Chess. Each website lets you explore an idea before deciding whether to continue in an app.