This product was not featured by Product Hunt yet. It will not be visible on their landing page and won't be ranked (cannot win product of the day regardless of upvotes).
SudoSketch makes online Sudoku feel like paper. Write numbers directly into the grid with Apple Pencil, stylus or finger, or use the classic keypad. Play six difficulty levels and daily challenges, print puzzles, learn techniques interactively, and ask Sudoku Coach for the next logical move without revealing the whole solution. It is free, browser-based and requires no account.
I built SudoSketch because playing Sudoku online often felt less natural than solving it on paper.
The original idea was simple: let people write numbers directly into a digital Sudoku grid using an Apple Pencil, stylus or finger. From there, SudoSketch developed into a broader place to play, practise and improve.
It now includes six difficulty levels, daily challenges, printable puzzles, interactive technique lessons and Sudoku Coach. Instead of immediately revealing the answer, Coach identifies the next logical move and explains why it works.
SudoSketch is free, works directly in the browser and does not require an account or download.
I would especially value feedback on the handwriting experience, the Coach explanations and how easily new players can move from learning a technique to using it in a real puzzle.
The handwriting-into-grid approach with Apple Pencil feels like the most natural way I've played Sudoku on a screen. Nice touch letting Sudoku Coach nudge you without flat-out giving the answer away.
Apple Pencil input feels really natural here, almost like jotting down numbers in a notebook. Liked that the hint button just nudges you instead of handing over the whole answer.
The handwriting-on-grid approach is so well done, it actually feels like the ink is sitting on the puzzle rather than under a UI layer. Love that the coach nudges without spoiling.
The handwriting input with my stylus actually felt really natural, like I was scribbling in a notebook instead of tapping boxes. Honestly the coach hint feature is what got me, it nudges you without spoiling the whole solve.
One thing that would help me a lot is a dark mode for the grid and pencil marks, since I often play late at night and the bright white background strains my eyes. Could you also add an option to auto-highlight the row, column, and 3x3 box when I tap a cell, so I can spot conflicts faster.
The pencil-on-paper feel really shines here, especially how the handwriting stays crisp without any lag. Love that Sudoku Coach nudges you toward the next logical move instead of just handing over the answer.
Being able to share a puzzle link with a friend so they can solve the same grid would be a great touch, especially for the daily challenge.
About SudoSketch on Product Hunt
“Free online Sudoku you can write in”
SudoSketch was submitted on Product Hunt and earned 12 upvotes and 14 comments, placing #160 on the daily leaderboard. SudoSketch makes online Sudoku feel like paper. Write numbers directly into the grid with Apple Pencil, stylus or finger, or use the classic keypad. Play six difficulty levels and daily challenges, print puzzles, learn techniques interactively, and ask Sudoku Coach for the next logical move without revealing the whole solution. It is free, browser-based and requires no account.
SudoSketch was featured in Web App (122.9k followers), Education (78.9k followers) and Games (98.7k followers) on Product Hunt. Together, these topics include over 93.2k products, making this a competitive space to launch in.
Who hunted SudoSketch?
SudoSketch was hunted by Mark Gorton. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Mark Gorton