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Ages 4–12 · Pure numbers

Sudoku Junior.
Classic puzzles, gently guided.

Real sudoku for kids that grows with them: from a friendly 4×4 to a full 9×9 — and a 12×12 for experts. Playful tutorials teach each new board size as kids play, three free hints help when they're stuck, and there's never a timer, no way to lose, and no ads.

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Coming soon to the App Store Coming soon to Google Play
  • Fully offline — planes and car rides included
  • No ads, ever
  • One unlock, shared with the whole family
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Why kids (and parents) like it

Real sudoku, sized for little kids

Four board sizes that grow with them

Start on a friendly 4×4 at age four, graduate to 6×6, master the classic 9×9, and take on a 12×12 expert tier. Every level ships on the device, machine-verified with exactly one solution.

Tutorials that teach by playing

Each board size opens with a playful guided level: highlights and step-by-step prompts show what rows, columns, and boxes need — no reading required. Skippable, and replayable anytime.

Gentle by design

No timers, no lives, no fail states, no lost progress. Wrong entries are simply correctable — mistakes are part of learning, not something to punish.

Help that fits small hands

Tap a cell, tap a number — no typing, no dragging precision. Three free hints every level for when they're stuck, undo and eraser always at hand, and pencil marks for older kids on the big boards.

A map journey per board size

Progress renders as a visual journey: kids always see where they are, what they've done, and the one obvious next level. All four tiers are visible from the start.

Built for kids, safe for parents

No ads, no accounts, no chat, no third-party links outside a parental gate. Purchases and settings sit behind a parents-only math challenge.

How it works

Three steps, zero frustration

  1. Pick a level on the map

    Each board size has its own journey. The next level is always obvious — young kids can start a 4×4 without reading a word.

  2. Tap a cell, tap a number

    That's the whole input. Every row, column, and box needs each number exactly once. Hints, undo, and the eraser are right there when needed.

  3. Celebrate and move on

    A calm, happy celebration marks every finished puzzle, and the map advances. No score pressure, no countdowns — just the next adventure.

Screenshots

A first look

Real captures, straight from the app.

  • The tier map: a paper-cut hillside trail of level pins, some solved in mint, the next one waiting in honey.

    Tier map

  • A 4 by 4 board mid-solve, with coral given cells and cream empty ones.

    A 4×4 in play

  • The calm level-complete celebration screen.

    Level complete

Pricing

Try every board size free. One unlock for everything.

There are no ads and nothing else to buy — ever. Kids sample the first 10 levels of every tier for free; a single purchase, behind the parental gate, unlocks the rest for the whole family.

Free

Every kid starts here

  • The first 10 levels of every board size — 4×4 through 12×12 (40 of 228 puzzles)
  • Every guided tutorial
  • Three free hints per level, undo, eraser, and pencil marks
  • Full offline play

Unlock everything

Once — for the whole family

  • All 228 levels across every board size
  • One-time purchase — no subscription, no coins, no consumables
  • Family Sharing: one purchase covers the household
  • Restorable on any new device

Privacy, for parents

Made for kids means built like it

  • No ads, no ad networks — not "family-friendly ads", none at all
  • No accounts, no sign-in, no chat, no personal data collected
  • Progress lives on the device; gameplay never touches the network
  • Crash and usage reporting is COPPA-configured, with a parent opt-out in the Parents Hub
  • Purchases, settings, and every external link sit behind a parental gate

The full details live in our privacy policy.

FAQ

Questions parents ask

What ages is Sudoku Junior for?

Ages 4–12. Four-year-olds start on guided 4×4 boards with no reading required; older kids grow into 6×6, the classic 9×9 with pencil marks, and a 12×12 expert tier.

Are there really no ads?

Really none. The app contains no ad networks of any kind — not even "kid-safe" ones. It earns its keep through a single optional one-time unlock purchase instead.

Does it work offline?

Yes — 100% of gameplay works in airplane mode. Every puzzle ships inside the app, and progress is stored on the device. Planes, road trips, and dead zones are exactly what it's built for.

What does the one-time purchase include?

Everything: all levels in all four board sizes, forever. It's a single non-consumable purchase, with Family Sharing enabled — no subscription, no coins, no follow-up paywalls. The first 10 levels of every board size stay free (40 of 228 puzzles) so kids can try before you buy.

Is my kid's data safe?

The app collects no personal information: no accounts, no names, no photos, no location, no ad identifiers. Crash and usage reporting is configured for children's-privacy compliance (COPPA), and parents can switch it off entirely from the gated Parents Hub.

Can my kid buy something by accident?

No. The only purchase in the app sits behind a parental gate — a fresh adults-only math challenge every time — and payment still goes through the App Store or Google Play with your device's normal purchase confirmation on top.