iPhone & iPad · Ages 5-12

Four thinking puzzles, no ads, no accounts

Puzzeroo is a small, quiet puzzle app for children aged five to twelve. Mini sudoku, number pyramids, word search and kriss kross, with eight hundred hand-checked levels between them. All of it works offline. Nothing tries to sell to your child, and nothing asks who they are.

Download on the App Store Free printable worksheets

One payment unlocks everything. No subscription.

The Puzzeroo mascot, a cheerful pixel-art character

See it in action

Every picture below is a straight screenshot of the app running on an iPhone. No mocked-up screens, and no marketing text painted over the top. Big tap targets, one clear rule at the top of every puzzle, and a quiet celebration when it is finished.

The Puzzeroo home screen: four puzzle cards, one each for Number Pyramid, Mini Sudoku, Word Fit and Word Search, every one with its own colour and a progress bar.
Four puzzle types, one tap from home.
A six by six mini sudoku part-solved, with the given numbers in green, the player’s answers in purple, and pencil marks in two empty squares.
Mini sudoku, with pencil marks for working it out.
A number pyramid part-solved: amber given blocks along the base and the player’s own numbers stacked above them, with a number pad below.
Number pyramids: every block is the two below, added up.
A word search grid with DESK, LESSON and PAINT circled in purple, green and red, and the same words struck through in the word list below.
Word search: drag a word, and it keeps its own colour.
A kriss kross crossword with ANT, FOG and FIRST filled in, the word IGLOO picked up from the bank, and every slot it could fit lit up.
Kriss kross: pick a word and its possible homes light up.
The moment a word search is finished: the grid fades back to just the found words in their colours, and confetti bursts out of it.
Finishing one is the whole reward. No scores, no timers.

Four kinds of thinking

Each puzzle type asks for something different: elimination in the sudoku, arithmetic in the pyramids, pattern-spotting in the word search, and fitting words to gaps in the kriss kross. A child who bounces off one usually falls for another. Every type has two hundred levels, and a free printable pack you can try right now.

Mini Sudoku

Mini sudoku on 4x4 and 6x6 boards. Deduction without a single sum. Every puzzle has one answer, and never needs a guess.

4 free printable packs →

Number Pyramid

Every brick is the two below it added together. Mental arithmetic that feels like a puzzle rather than a page of sums.

3 free printable packs →

Word Search

Themed grids where each word hides in exactly one place. The gentlest puzzle here, and the best one for a tired afternoon.

7 free printable packs →

Word Fit

A crossword with no clues: every answer is given, and the child works out where each one goes from lengths and crossings.

3 free printable packs →

What Puzzeroo does not do

Most of the decisions in this app were about what to leave out. Children's software has a bad reputation for good reasons, and the shortest way to explain Puzzeroo is by what is missing from it.

  • No adverts, everNot banner ads, not video ads, not "watch this to continue". There is no ad network in the app at all.
  • No accounts or sign-inNo email address, no name, no birthday, no profile. Nothing to remember and nothing to leak.
  • No subscriptionOne optional purchase unlocks every level permanently, on every device signed in to your Apple Account.
  • No internet neededEvery puzzle is generated on the device. It works in aeroplane mode, in the car, and on a hotel Wi-Fi that will not load.
  • No streaks or timersNothing counts down, nothing nags, nothing punishes a child for putting it down for a fortnight.
  • No third-party trackersNo advertising SDKs, no analytics companies, no social logins. See the privacy policy for exactly what is and is not collected.

Every puzzle has exactly one answer

This sounds like a detail and it is not. A great many puzzle apps and printable worksheets fill their grids at random and hope for the best. That is how you get sudoku with two valid solutions, word searches where a word turns up twice, and answer keys that mark a correct child wrong.

Puzzeroo's four puzzle generators each run a solver over every puzzle before it is ever shown. A sudoku is discarded unless the solution count is exactly one. A kriss kross is discarded if any two same-length words could be swapped. A word search grid is re-scanned in all eight directions and rebuilt if a target word can be read in more than one place. A number pyramid is rejected unless exactly one set of numbers fits the clues.

So nothing in the app or on the worksheets ever needs a guess. That has been checked, not hoped for.

A solved four-by-four mini sudoku Six starting numbers shown in black and ten deduced numbers shown in purple. This puzzle has exactly one solution, and a tick seal marks it as verified. 2413134242313124
A real 4x4 board: six givens in black, the rest deduced. Run a solver over it and the answer comes back one. Every board in Puzzeroo has passed that test before a child ever sees it.

17 free printable worksheet packs

No email address, no sign-up, no watermark. Every pack is a four-page A4 PDF: three puzzles, then a full answer key. The same verified engines that power the app make them, and they are free to print, photocopy and hand out at home or in class.

The puzzles on the worksheets are not the puzzles in the app. They come from a separate range, so printing them gives nothing away and a child can happily do both.

Browse all free worksheets

Questions parents ask

What age is Puzzeroo for?

Five to twelve. The easiest levels are 4x4 sudoku and addition-only pyramids, gentle enough for a five-year-old working alongside an adult. The hardest ones will keep a twelve-year-old busy. Each of the four puzzle types has two hundred levels that step up gradually rather than jumping.

Does Puzzeroo need an internet connection?

No. Every puzzle is generated on the device, so the app works identically on a plane, in a car, or with the iPad in aeroplane mode. There is nothing to download after installing and nothing to wait for.

Are there adverts or in-app purchases aimed at children?

There are no adverts at all, and nothing in the app tries to sell to a child. There is a single optional one-off purchase that unlocks the later levels, and it sits behind the usual iOS purchase confirmation. There is no subscription, no loot box, no currency and no timer nagging anyone to come back.

Do you collect any personal data?

No. There are no accounts, no sign-in, no email address and no name. Out of the box the app sends nothing at all: anonymous usage data is switched off until a grown-up turns it on in Settings, and can be switched back off in one tap. If it is on, what goes to our own server is which puzzle types get played, how long a session lasted and whether a level was finished. No IP address is recorded and no third party sees any of it. The privacy policy sets it all out in detail.

How many puzzles are there?

Eight hundred levels: two hundred levels in each of the four puzzle types, running seventy easy, seventy medium and sixty tricky. The first fifteen levels of every type are free, so there are sixty puzzles to try before deciding whether to buy.

Can I use it on more than one device?

Yes. The purchase is tied to your Apple Account, so it restores on any iPhone or iPad you sign in to at no extra cost. There is a Restore Purchases button in Settings if it does not happen automatically.

Are the printable worksheets really free?

Yes, and there is no email wall or sign-up. Every pack on this site is a direct PDF download, free to print, photocopy and hand out at home or in a classroom. They are generated by the same engines as the app, so every puzzle is original and has exactly one verified solution.

Something not answered here? Email support@puzzeroo.app, or read the support page.