Ninefold: Daily Variant Sudoku
Killer, Thermo, Jigsaw & more
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
A new sudoku variant every day, a 6×6 Sprint you can share, and a coach that names the technique behind every hint.
Ninefold Sudoku is the daily home for variant sudoku.
A NEW VARIANT EVERY DAY
Monday Classic, Tuesday Killer, Wednesday Diagonal, Thursday Jigsaw, Friday Thermo, Saturday Sandwich, and a Sunday Duo that combines two rule sets. Every daily puzzle is hand-verified to have exactly one solution and to be solvable by pure logic — no guessing, ever.
THE 6×6 SPRINT
A one-to-three-minute race with an accuracy grid you can share: green for first try, yellow for corrected. Compare times with friends and on Game Center.
A COACH THAT TEACHES
The hint button never just gives you a digit. First a nudge ("Look at box 5"), then the name of the technique, then the deduction drawn on the board, and only then the digit. Twenty-four techniques, from naked singles to X-Wings, XY-Wings, cage combinations, the 45 rule, thermometer bounds and sandwich arrangements — each with a playable lesson and a mastery badge.
EVERY VARIANT, UNLIMITED
Practice any variant at five grades, from Easy to Extreme, with thousands of verified puzzles and new ones generated as you play. Take on the weekly Variant Cup: seven puzzles, one score, one leaderboard.
MADE TO BE HELD
Ink on warm paper, a board drawn like a printed puzzle magazine, digits that drop in with a soft ripple, calm sound and haptics designed together. Dark theme, four extra themes, full Dynamic Type and VoiceOver support, left-hand mode, and an iPad layout.
STREAKS AND STATS
Separate streaks for the variant and the Sprint, Perfect Days, streak freezes, a calendar archive, per-variant stats, achievements and a trophy room. Widgets show today's variant and your streak.
FAIR BY DESIGN
Ads appear only on the completion screen, never on the board. One purchase removes them for good. Hints are always available by choice.
Ninefold Premium (optional): no ads, unlimited hints, the full archive, every theme and advanced stats — $3.99/month or $19.99/year with a 3-day free trial. Payment is charged to your Apple ID; subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. Privacy: https://ninefold-sudoku.pages.dev/privacy/ · Terms: https://ninefold-sudoku.pages.dev/terms/
Ratings & Reviews
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The developer, Shup LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Location
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Shup LLC
- Size
- 41.7 MB
- Category
- Puzzle
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 9 more
- English, French, German, Hebrew, Italian, Japanese, Korean, Portuguese, Russian, Spanish
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Premium Monthly $3.99
- Premium Yearly $19.99
- Starter Pack $0.99
- 2 Streak Freezes $0.99
- 300 Hints $9.99
- 100 Hints $4.99
- 30 Hints $1.99
- Ad-Free $7.99
- Copyright
- © 2026 Shup LLC
