GridLab
Design Sudoku puzzles worth solving by hand
GridLab launched on May 13, 2026 with 3 votes, #3,449 of 20,536 launches that month and more than 50% of that year's launches.
What it does
GridLab is an iPad app for designing Sudoku puzzles to solve by hand, not on screen. You set the constraints, generate the grid, then export to PDF, PNG, SVG, or EPUB for paper, physical media, or e-ink. 5 combinable variants: Classic, X-Sudoku, Anti-King, Anti-Knight, Hyper. Every puzzle shows its logical depth, clue density, and whether it requires guessing to solve. No hints, no gamification, no ads, no subscription. A voluntary tip is the only ask. Free to download. iPad only.
Download GridLab by Mercurio Solutions on the App Store. See screenshots, ratings and reviews, user tips, and more apps like GridLab.
Productivity Developer Mercurio Solutions Language EN + 2 More Size 1.4 MB iPad, Mac GridLab is now on Mac too. With batch generation you set the parameters once and find twenty puzzles ready in your library. GridLab creates Sudoku puzzles designed to be solved by hand. On paper. On wood. On e-ink. It's not a game. It doesn't teach, hint, or guide. It prepares puzzles, then steps aside. Available on iPad and on Mac, with the library synced through iCloud. ▸ ADVANCED VARIANTS Each puzzle freely combines one or more geometric constraints: • Classic: the standard rules • X-Sudoku: both main diagonals must also contain 1-9 • Anti-King: no equal numbers in diagonally adjacent cells •…from apps.apple.com
Does a similar job
all alternatives →
Magic Sudoku - ARkit2017 · magicsudoku.com · ▲279Solve sudoku puzzles like magic with the power of AR
- Magic Sudoku - ARkit2018 · magicsudoku.com · ▲51
Solve sudoku puzzles like magic with the power of AR
open source Sudoku random board generator for iPhone / OS X2012 · jayfuerstenberg.com · ▲21
More work this month
the category →
Endless lofi beats composed live in your browser, over pixel-art nights in Paris, Tokyo, New York, Hong Kong, Sydney, San Francisco and more. Free, no sign-up.
Work · 30d ago · loficities.com
Smooth Recorder▲257Mac screen recordings that look edited when you hit stop
Work · 24d ago · smoothrecorder.com
Work · 18d ago · readrare.com
Source: Product Hunt launch ↗
Launched alongside, May 2026
the whole month →
Parallel agents, diff reviewer, and multi-model comparisons
Dev tools · May 2026 · kilo.ai
Hey HN, Henry here from Cactus. We open-sourced Needle, a 26M parameter function-calling (tool use) model. It runs at 6000 tok/s prefill and 1200 tok/s decode on consumer devices. We were always frustrated by the little effort made towards building agentic models that run on budget phones, so we conducted investigations that led to an observation: agentic experiences are built upon tool calling, and massive models are overkill for it. Tool calling is fundamentally retrieval-and-assembly (match query to tool name, extract argument values, emit JSON), not reasoning. Cross-attention…
Life & fun · May 2026 · github.com
🌱 Private, quiet space for thinking. Simple app for .md files. - zakirullin/files.md
Dev tools · May 2026 · github.com