koushi – Word Fill-In Puzzles

neuro / dev

In-app purchases

About this game

Classic fill-in puzzles reimagined. Experience visual silence. Discover koushi.

koushi brings the classic fill-in puzzle to your smartphone in a completely new, soothing dimension. Developed with an uncompromising focus on reducing sensory overload, koushi offers a logic experience for adults that concentrates on the essentials: you and the letters. While other word game apps disrupt your concentration with flashing banners, loud pop-ups, and artificial time pressure, koushi takes a completely different path. Just like the "good old" puzzle book, but on your smartphone. Are you looking for high-quality word search games in English that challenge your mind without overstimulating you? Then you've come to the right place.

Why koushi is different
For us, "Visual Silence" means a minimalist interface free of any distractions. The app is 100% ad-free. We never interrupt your flow—no annoying videos, no hidden dark patterns, and no artificial forced breaks. You pay once for premium packs or use the free starter pack and the free daily puzzles. The design is extremely focus-friendly, featuring clean typography and an eye-soothing Dark Mode, ideal for anyone who wants to enjoy a brain workout without tired eyes.

Smart mechanics for pure logic fun
The gameplay is elegant and challenging: logically fit the given words from our extensive list into the grid until the board is complete—a game mode also known as a crossword puzzle without clues. There is no timer, allowing you to solve this relaxing brain game at your own pace. For very large puzzles, our filter bar helps radically reduce the cognitive effort of searching. When you tap a word, "Smart Dimming" automatically dims all incompatible cells. Losing your bearings on massive grids? Our abstract map view (bird's-eye perspective) shows you the entire layout so you always keep the overview. A simple double-tap zooms you right back in. For uncertain intersections, use the unique Draft Mode: tentatively place words into the grid as if written in pencil, test combinations without fear of making mistakes, and only ink them in when you are entirely certain. Your progress so far remains protected.

Completely offline and 100% private
koushi is your digital retreat. That's why the game is fully playable offline. Whether on a train, in the woods, or with your Wi-Fi turned off—koushi is always ready. We deeply respect your privacy, entirely forgo tracking mechanisms, and collect zero data. Your data never leaves your device.

Daily challenges without toxic pressure
Alongside our starter pack, koushi offers a new challenge every day. Unlike conventional apps, we deliberately avoid punishing "daily streaks" or pushy notifications. If you miss a day, that's perfectly fine. You can always return to the quiet archive. Our level packs follow a "Flow Arc": start with small grids to warm up and build your way up to epic masterpieces.

Download koushi and enjoy the silence. Your new retreat for the mind.

What’s new

I want koushi to be as visually silent as possible. This update brings a major improvement of the UI (user interface) and makes koushi look more polished and smoother than ever. So you can focus on what matters: You and the words.