Sudoku Still: Learn to Solve

No ads. No video after every puzzle. No account.

Hints put you on the right track instead of giving away the digit. Over time that gets you onto levels you cannot handle today.

HINTS IN THREE STEPS
First step: which technique applies, and in which area. Second: the exact spot. Third: the digit, or for a pattern the notes it removes. You stop whenever you have enough. Ordinary hint buttons fill in a cell right away.

20 LESSONS
From scanning to advanced patterns. 17 of them show their technique in examples on the board.

YOU SEE WHAT STICKS
After every move the app knows which technique was due, and it remembers whether you spotted it yourself or had it shown to you. That becomes a bar per technique that fills until the technique is solid. No percentages.

PLAYING FOR FREE
Easy and Medium unlimited, with all hints and notes. Plus the Daily Challenge every day, on every level up to Expert. Plus unlocks Hard and Expert permanently.

DAILY CHALLENGE
The same puzzle worldwide, one per day. Solving it counts toward your streak.

NO GUESSING REQUIRED
Not even on Expert. Most apps only check that a puzzle has exactly one solution. Whether a person can find it without trial and error is a different question. Sudoku Still also runs every board through a solver that knows only human techniques, and discards what it cannot finish.

LEVELS BY TECHNIQUE
A puzzle's level depends on the hardest technique it requires, not on how many digits are missing. Hard is therefore equally hard every day.

NOTES THAT KEEP COUNT
Candidate notes update themselves when you enter a digit, and a hint reads your current notes and carries on from there. Not a rebuild of paper and pencil, but what a screen can actually do.

SMALL AND OFFLINE
Smaller than a photo. Runs without a connection and without video, which goes easy on the battery. Collects no data at all.

ALSO
On the iPhone Duo, the board and the controls each take one half when it is open sideways or standing half open.

Streak, level and best times live in your iCloud, on iPhone and iPad, with no account and no sign-in. Siri and Shortcuts answer your streak and best time without the app opening, and the lessons are in Spotlight.

SUDOKU STILL PLUS
Plus opens up "Hard" and "Expert" in free play: boards where the patterns from the tutorial are actually needed, as often as you like. Family Sharing makes one subscription count for everyone in your family. Without Plus, Easy and Medium and the Daily Challenge stay fully open.

Sudoku Still Plus is an auto-renewable subscription (monthly or yearly). Payment is charged to your Apple Account at confirmation of purchase. It renews for the same period unless canceled at least 24 hours before the end of the current period. Manage and cancel it in your Apple Account settings after purchase.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://kornelius.org/sudoku/datenschutz