Summers meant the beach, and the beach meant a stack of Turkish newspapers — Hürriyet, most memorably — with a crossword tucked in next to the day's headlines. Somebody would grab the puzzle page before anyone could argue about it, and that was the plan for the next hour: towel down, squint against the glare, and work through the grid one clue at a time while everyone else was in the water.

There's something about solving a crossword in your first language, in a place you associate with having nothing else to do, that sticks with you in a way a polished app experience usually doesn't. No leaderboard, no undo button, no autosave — just a grid, a clue list, and whatever you could remember or guess your way into. If you made a mistake, you saw the eraser marks. If you finished one, you actually felt like you'd finished something.

That's the feeling we kept coming back to while building Crossword Builder. Not the nostalgia for its own sake — the actual mechanics of it. The satisfaction of a clean grid. The small thrill of a long answer finally clicking into place because of a crossing letter you weren't sure about. The fact that someone else made that puzzle, on purpose, for you to solve.

Most crossword apps today are built for daily-puzzle consumption: open the app, solve the one puzzle it gives you, close the app. That's a fine model, but it skips the part we actually cared about — the making. Somewhere between a folded newspaper at the beach and a phone in your pocket, the tools to actually build a crossword stayed locked away with professional constructors and their specialized software. We wanted to hand that part back to anyone who's ever finished someone else's puzzle and thought, "I bet I could make a better one."

So that's really what Crossword Builder is: a bet that the person who grew up doing the newspaper crossword on vacation still wants to make one, not just solve one. If that's you — build something, publish it, and see if anyone else has the beach-towel patience to finish it. (More on the team behind it on our About Us page, and on the family of apps we've built along the way in Meet the Pin Traveler App Family.)

The grid looks the same upside down

Turn a standard crossword grid 180 degrees and the black squares land in exactly the same spots. That's rotational symmetry, and it's the single most recognizable convention in the genre — it's part of what makes a crossword look like a crossword at a glance.

This is also the one rule Crossword Builder handles for you automatically: place a black square anywhere in the grid, and the app mirrors it to the opposite corner for you, the same way a published grid is built.

Every letter is checked twice

In a standard American-style grid, every single letter belongs to one across word and one down word. There's no such thing as a letter that only shows up in one direction — solvers can always cross-check a guess against the other word running through that square. Grids that break this rule (common in British-style cryptics) are a different tradition entirely, not a mistake, but it's not what most solvers expect from an American-style puzzle.

No word shorter than three letters

Two-letter answers are off-limits. It's a fill-quality rule more than an aesthetic one: two-letter combinations are either too easy (basically free) or too obscure to be fair, so the convention just rules them out entirely.

Black squares can't split the grid in two

However you place your black squares, a solver has to be able to get from any white square to any other white square without hitting a wall. If your grid design accidentally cuts it into two disconnected regions, that's not a themed choice — it's a construction error.

Keep the black squares reasonable

There's no hard modern limit, but a good grid doesn't lean on black squares to avoid doing the work of filling it in. Big clusters of black squares, and especially "cheater squares" — black squares added purely to make filling easier, without which the grid would still be valid — are generally a sign a grid needs another pass, not a finished puzzle.

Long theme entries mirror each other

If your puzzle has a theme, the entries that carry it are usually placed symmetrically in the grid — same as the black squares. And as a rule of thumb, no ordinary fill word should be longer than your shortest theme entry; if it is, it's probably competing with the theme for attention instead of supporting it.

Every word pulls its weight

Two conventions that are really the same idea: don't repeat a word anywhere else in the grid, and don't use an answer that isn't a real, recognizable word or name. A repeated entry feels like the constructor ran out of ideas; a made-up one breaks the solver's trust that every answer is actually gettable.

None of this is about rigid rules for their own sake — it's about what makes a grid feel fair and satisfying to solve. If you're building your first puzzle in Crossword Builder, you don't need to memorize all of this before you start; symmetry and numbering are handled for you, and the rest gets intuitive fast once you've filled a grid or two. For a more practical, step-by-step starting point, see 5 tips for building your first crossword. Otherwise, give it a try.

Crossword Builder

The app this blog lives on. Design a crossword grid with real constructor tools — symmetric black squares, live numbering, AI-assisted clues — then publish it so friends and strangers can solve it, race the leaderboard, and see how they stack up.

Pin Traveler

The original app, and where the team name comes from. Pin Traveler turns your travels into a personal map: pin the places you've been, save memories and photos against each destination, and see your travel history summarized in your own statistics. If you like the idea of building something visual out of your real-life trips, check it out.

Travel & Trip Video Animator

Takes a trip — its route and its stops — and turns it into a polished, shareable animation. Built for people who want a trip recap that's more interesting than a map screenshot.

Photo Optimizer

A focused tool for a boring but universal problem: your camera roll is full of near-duplicates and giant files you don't need. Photo Optimizer helps you review large and duplicate photos and reclaim storage without digging through your library by hand.

Better Clock

A world clock for people who actually coordinate across time zones — for work, for travel, or for keeping up with people who live somewhere else. Simple, and exactly as complicated as it needs to be.

Art.iz

A guide to museums, galleries, exhibitions, and cultural spaces, for whenever you want a day out that isn't another restaurant. Good for travel, good for a random Tuesday at home.

That's the family, for now. If you've been using one of these apps and are curious what else we make, hopefully this saves you some searching — and if you haven't tried Crossword Builder yet, now's a good time.

1. Start with your theme entries, not the grid

Before you touch a single black square, decide on the two or three longest, most interesting answers you want in the puzzle. Everything else — the grid shape, the shorter fill — gets built around them, not the other way around.

2. Keep symmetry simple

Crossword Builder auto-mirrors your black squares with true 180° rotational symmetry as you place them, just like a published grid. Don't fight it — lean into simple, open grid shapes for your first few puzzles. Dense, showy grids are a lot harder to fill cleanly.

3. Numbering takes care of itself

You don't need to think about across/down numbering at all — it updates live as you build. Focus on the words, not the bookkeeping.

4. Write clues last

It's tempting to write a clue the moment you drop in an answer, but clue quality usually improves once you can see the whole grid and how entries relate to each other. If you get stuck, the AI-assisted clue suggestions are a good way to break through writer's block.

5. Solve your own puzzle before you publish

The fastest way to catch an awkward crossing or an obscure entry is to solve your own grid start to finish. If a section trips you up while you already know the answers, it'll trip up everyone else too.

Ready to build your first grid? Download Crossword Builder and give it a shot.