A puzzle app that respects an evening.

The idea

Most puzzle apps pull in one of two directions. Either they are a single game with no reason to return once you have solved it, or they are a slot machine with a puzzle painted on the front — endless sessions, endless prompts, endless noise.

Logikoo aims at the space between. The puzzles are honest classics with no gimmicks, and the progression around them is deliberately finite: a handful of runs before the energy is spent, a short list of tasks each day, a season that ends and starts again. You close the app because the session is over, not because you finally managed to.

Why these thirteen

Each of the thirteen asks for a different kind of thinking, and that variety is the point — a bad night at Sudoku is a good night at Simon.

• Memory Match — recall, under a move counter.
• Sudoku — constraint logic on a 6×6 grid, sized for a phone.
• Lights Out — parity puzzles that look like luck until they suddenly don't.
• Mastermind — deduction from partial feedback.
• Tower of Hanoi — recursion you can feel in your hands.
• Simon — working memory, and nerve.
• Sliding Puzzle — spatial planning several moves ahead.
• Zip — route-finding, with checkpoints to hit in order.
• Patches — carving a board by area and shape.
• Crowns — elimination: every crown rules out a row, a column, a region and a ring around it.
• Day & Night — balance, one sun or moon at a time.
• Pixels — line-by-line deduction that ends in a picture.
• Connect — paths that must never cross and must fill everything.

Every board in Zip, Crowns, Day & Night and Patches has exactly one solution, and every Pixels board can be solved without a single guess — the puzzles are generated fresh each round, but never unfair.

All thirteen ship in Easy, Medium and Hard. The difficulty is not a cosmetic label: it changes the board size, the number of colours or the count of starting clues, and it is recorded alongside your result so leaderboards only ever compare like with like.

How the loop works

Four systems sit under the thirteen games, and they all feed each other.

Energy

Starting a game costs energy out of a bar of fifteen, and the bar refills on its own — a fresh one every few minutes. It is the app's way of saying that a session has a natural end.

Tasks and levels

Daily tasks ask for something specific — win Lights Out ten times, or finish under a time — and pay fires, coins and XP when you finish them. Every completed game also feeds the XP bar; levels release milestone rewards and unlock the Hard difficulty at level 5.

Chests, loot and the shop

Chests come in five tiers — Wooden, Iron, Silver, Golden and Platinum — handed out by tasks and milestones, or bought with the coins you earn. A chest opens into items with a rarity, and rarer drops get the loud treatment. Gems you don't need go back for coins; skins, frames and banners stay on your profile.

Fires and leaderboards

Wins earn fires, and fires are what rank you. There is a board for the week, the month, the season and all time; the week's top three take chests home when it settles. Records are also kept per game and per difficulty — fewer moves, fewer mistakes and less time make for a better one — and your own row is highlighted so you can find yourself without scrolling.

Fair play

A leaderboard is only worth something if the results on it are real. Scores are submitted to and validated by our server, and results that are impossible for the difficulty they claim can be rejected or removed. Accounts used to cheat, automate play or manipulate rankings can lose their entries or be closed — the details are in the Terms & Conditions.

The craft

Logikoo is built in Flutter from a single design system: one violet accent, Figtree in its heavy weights, and a flat 4px radius on every card, button and input. Glow is scarce on purpose — it is spent only on things that should feel valuable: energy, rarity, chests, and your own row on a leaderboard.

The account side is just as plain. Logikoo keeps your progress, your loot and your place on the boards on our own server so it follows you between devices, and asks for nothing it does not need to do that — written out in full in the Privacy Policy.

Who makes it

Logikoo is made by DevHaven Apps, a small independent studio. If you have found a bug, want a game added, or need something done with your account, write to support@devhavenapps.com — a person reads it.