Sudoku that fits the screen exactly.
Drawn as vector at your device’s exact pixel size. Tap the index to jump to a puzzle, tap again to check the answer.

Works with
Every 10.3 inch e-ink tablet uses effectively the same page, within three quarters of a millimetre. One file fits all of them. The reMarkable Paper Pro is genuinely larger, so it gets its own, and both are included with every purchase.
Packs
$5 each

Easy, 100 puzzles
$5
100 puzzles · both device sizes

Medium, 100 puzzles
$5
100 puzzles · both device sizes

Hard, 100 puzzles
$5
100 puzzles · both device sizes

Expert, 100 puzzles
$5
100 puzzles · both device sizes

Mixed, 200 puzzles
$5
200 puzzles · both device sizes
Or build your own with the exact mix you want.
Graded by technique
Not by clue count. Difficulty is the hardest move a puzzle genuinely needs, from singles up to Swordfish.
Never a guess
Every puzzle has one solution and is solvable by logic alone. Anything else is discarded, not sold.
Both devices
reMarkable Paper and Paper Pro, sized to the panel. No scaling, no letterboxing, no borrowed margin.