Apps · 7 min read

The best Sudoku app on the App Store

Why the standard "the best Sudoku app on the App Store" is not a marketing line, it is a product test. The five editorial decisions behind Sudoku BLA.

It can sound like a boast. Sudoku BLA wants to be the best Sudoku app on the App Store. It is not a marketing line. It is a product standard. It was the first question that organized the build. It was the last question that organized the finished version. And it will keep being the question that organizes everything that comes next.

The standard belongs to Ivan Grycuk, founder and director of BLA Publicações e Conteúdo Digital. He has loved Sudoku for years. He plays before bed, in the bank line, in the elevator, on international flights. Before making an app, he was a faithful user of a Sudoku from Apple Arcade that stopped getting updates after the pandemic. Bugs piled up. Patience ran out. He decided to make his own. And to make the best.

For Ivan, best starts with quality and consistency. A game app that crashes on a common action is not an app, it is a headache. An iOS update that breaks a round in progress is a failure no one should have to tolerate. Sudoku BLA was written from scratch in pure SwiftUI, with no inherited dependencies, no legacy code. Every release goes through an audit before submission. When a new iOS version ships, BLA tests before publishing. It is a simple standard. It costs time. But it is the right standard.

Best also means silence. Sudoku BLA has no background music. No sound on a correct guess, no error effect, no fanfare when you finish the puzzle. If you want music, you pick another app. Sudoku BLA is a Sudoku app, not a jukebox. The silence is a decision, not an oversight. Sudoku is a game of concentration. A loud sound breaks the flow. And the flow is the whole point.

Best means working anywhere. Sudoku BLA is offline-first by principle. It does not need internet to open, to play, to pick up the round where you left it. It works in the elevator where the signal drops. It works on the farm. It works on the international flight, that moment when you decide to switch off from the world for nine hours. The app gets on the plane with you.

Best means not pushing you anything. Zero ads. Zero review prompts. Zero notifications pushing engagement. Zero permission dialogs asking for location, contacts, calendar, microphone, camera, nothing. BLA apps only ask for what they need to work, which in Sudoku is exactly nothing. No login. No profile. No social network. No tracking. You play Sudoku, and that is it.

There is a line Ivan repeats when he describes the standard for Sudoku BLA: you open the app for the first time and it simply works. It is a small UX gesture, but a rare one. It means the app does not greet you with a forced tutorial, a form, an email prompt, a cookie pop-up. It means it hands you the game right away. When you tap start, it starts. No friction. No queue. No dialog box. Sudoku.

So the best Sudoku app, for BLA, is the app that respects the reason the person opened Sudoku in the first place. Whoever opens Sudoku wants reasoning, calm and silence. Sudoku BLA delivers all three. Eight thousand puzzles across four levels, three editorial themes (Areia BLA, Tinta, Papel), runs on iPhone, iPad and Mac, available on the App Store in many countries. You can download. You can play. You can close and come back whenever. The app will not ask you for anything other than to play Sudoku.

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Sudoku BLA

Sudoku, pure. Eight thousand puzzles across four levels. Three themes (Areia BLA, Tinta, Papel). No ads, no data collection, no subscription. Universal for iPhone, iPad and Mac.