Suko for iPhone

Suko — An engaging number-placement puzzle for iPhone

Suko is a compact, logic-based puzzle designed for quick plays on your iPhone. It challenges your reasoning and arithmetic while fitting perfectly into short breaks or longer thinking sessions.

How the puzzle works

Place the digits 1–9 into the empty squares so that all constraints are satisfied:

• Cells immediately surrounding a small inner circle must add up to the value shown inside that inner circle.
• Groups of cells that share the same shading should total the number printed in the corresponding outer circle.

Each puzzle follows these two rules simultaneously, so you must balance local sums and shaded-region totals to find the correct arrangement.

Helpful features

• Hint system: Get nudges toward the next logical move when you’re unsure how to proceed.
• Instant reveal: If you really need it, a one-tap solution will expose the correct placement.
• Endless puzzles: A large or procedural puzzle pool means fresh challenges whenever you want them.

Benefits of playing

Suko is an entertaining way to sharpen mental arithmetic, pattern recognition, and deductive reasoning. Because games are short but brain-engaging, it’s great for daily practice or for deep-focus sessions.

Get started

Suko is available as a free download on the iPhone. Try a few rounds to see how quickly your logic and speed improve.