Sudokubed
Classic grids and a 3D cube
Six Sudoku grids cover a cube and share its edges, so each number on an edge must fit both faces. Flick to turn the cube, or play the classic 9×9 grid.
Play classic 9×9 Sudoku or solve a cube with a Sudoku grid on each of its six faces.
The cube
The faces share their edges. A number on an edge belongs to both neighbouring faces and must fit the rows, columns and boxes of each. Corners belong to three faces at once. Flick the board to turn the cube and work your way round all six sides.
Every puzzle is fair
Puzzles are made on your phone, so you won't run out. Each one has a single solution and can be solved by logic alone, without guessing. This also applies to cube puzzles, across all six faces.
Four levels
Choose Easy, Medium, Hard or Extreme. The harder the level, the fewer numbers you start with. On the classic grid that means about 40 on Easy and around 20 on Extreme.
How you play
- Tap a cell then a number, or pick a number first and tap every cell it belongs in
- Drag across the board to move the selection
- Pencil in notes. Placing a number clears it from the notes in its row, column and box
- Tap a number to highlight every matching number and note
- Undo, or shake your phone to undo
- Three hearts per game, and a wrong number costs one. On the cube, finishing a whole face wins a heart back
- A timer, and your best time for each level
Play it your way
- Numbers, letters (A to I) or fruit emoji
- Light or dark
- A monochrome mode that removes all colour
You can play without an account. Your games and best times stay on your phone.
Sudokubed is supported by ads. A single in-app purchase, Remove Ads, switches them off for good. See the privacy notice below for how ads work in the app.
Sudokubed support
Found a bug, stuck on a puzzle that looks wrong, or have a question about Remove Ads? Tell us here and we'll reply by email. Including your app version and iPhone model and iOS version helps us reproduce the problem.
Privacy notice
Effective 1 November 2026
About this notice
This notice explains what information the Sudokubed app for iPhone uses, who handles it, and the choices you have. It takes effect on 1 November 2026.
Sudokubed is made by Glusoft Limited ("we", "us"), company number 9806370, Ednaston Park, Painters Lane, Ednaston, Ashbourne, Derbyshire DE6 3FA, United Kingdom. For the purposes of UK data protection law, we are the controller of the limited information described here. Google, which shows ads in the app, is a separate controller of the information it collects.
The short version
- No account. You never sign up or give us your name, email or any contact details.
- Your game stays on your phone. Settings, saved games and best times are stored only on your device. We don't receive them.
- Ads are shown by Google AdMob. Google collects some device information to show and measure ads. Where the law requires it (for example the UK and EEA), you are asked for consent first, and Apple asks whether the app may track you.
- Purchases go through Apple. If you buy Remove Ads, Apple handles the payment. We never see your card or payment details.
- You can change your mind. Use Privacy choices in the app, the Tracking setting on your iPhone, or buy Remove Ads to stop ads entirely.
Information stored only on your device
The app keeps the following on your iPhone so it works the way you left it. None of it is sent to us or to anyone else, and it is deleted when you delete the app.
| What | Why |
|---|---|
| Display settings (light or dark, colour or mono, numbers, letters or emoji) | To remember how you like the game to look |
| Your game in progress | So you can continue where you left off |
| Best times for each difficulty | To show your personal records |
| A few ready-made puzzles | So new games start instantly |
| Whether you've bought Remove Ads | So ads stay off from the moment the app opens |
Puzzles are generated on your device. The app does not use your location, contacts, photos, camera or microphone.
Advertising (Google AdMob)
Unless you buy Remove Ads, the app shows a banner on the home screen and, now and then, a full-screen ad between games. These ads are provided by Google AdMob, a Google LLC service. We do not receive personal information about you from these ads; we receive only overall reports, such as how many ads were shown.
To show and measure ads, Google's software in the app may collect:
- your device's advertising identifier (only if you allow tracking, see below) and other identifiers for this app on your device
- your IP address, which gives an approximate location (such as country or city)
- information about the ads you see and tap
- your device type, operating system and app version
- technical and performance information, such as crash reports
Google uses this to show ads, to measure how they perform, to limit how often you see the same ad, and to detect fraud. With your consent, it also uses it to show ads based on your interests (personalised ads).
Consent. In the UK, the European Economic Area and Switzerland, a consent form from Google appears the first time you open the app. You can accept, refuse, or choose purposes. If you refuse, you may still see ads, but they won't be personalised.
Apple's tracking prompt. iOS then asks whether Sudokubed may track your activity across other companies' apps and websites. If you choose "Ask App Not to Track", your device's advertising identifier is not shared.
Google's use of this information is described in Google's Privacy Policy and How Google uses information from sites or apps that use its services.
In-app purchases
Remove Ads is a one-time purchase made through Apple's App Store. Apple processes the payment under its own terms and privacy policy. We never receive your name, Apple Account details or payment information.
The app checks with Apple, on your device, whether you own Remove Ads, so it can turn ads off and restore your purchase on another device. Apple gives us anonymous sales reports, which do not identify you.
Your choices
| To | Do this |
|---|---|
| Change your ad consent | In the app, tap Display, then Privacy choices (shown where the consent form applies) |
| Stop tracking | On your iPhone: Settings → Privacy & Security → Tracking, then turn off Sudokubed |
| Stop ads altogether | Buy Remove Ads from the home screen |
| Delete everything stored by the app | Delete Sudokubed from your iPhone |
Support requests
If you use the support form or email us, we receive what you send: your name, email address, message, and any app version or device details you include. The form is protected by Cloudflare Turnstile to block spam, which checks your browser under Cloudflare's Privacy Policy. We use support requests only to reply to you and fix the problem, never for marketing, and we don't share them with anyone else. Ask us and we'll delete your request.
Legal basis, transfers and retention
Legal basis. Under UK and EU data protection law, personalised ads, and storing or reading information on your device for advertising, rely on your consent, which you can withdraw at any time. Showing non-personalised ads, measuring them and preventing fraud rely on legitimate interests: keeping the app free to play and protecting it from abuse.
International transfers. Google may process advertising information in the United States and other countries. Google protects these transfers with the UK International Data Transfer Addendum, the EU Standard Contractual Clauses and, where it applies, the EU–US Data Privacy Framework and its UK extension.
How long information is kept. Information on your device stays until you delete the app. Google keeps advertising information for the periods set out in its own privacy policy. We keep only overall reports, which do not identify you.
Children. Sudokubed is not designed for children under 13, and we do not knowingly collect information from them.
Security. Game information stays inside the app's protected storage on your iPhone. Ad requests are sent to Google over encrypted connections.
Your rights and contacting us
You have the right to ask for access to, correction of or deletion of your personal information. You can also object to or restrict how it is used, ask to move it elsewhere, and withdraw consent at any time. Because we hold no information that identifies you, most requests about advertising data are best made to Google, through the links above. We will still help with any question you send us.
If you are unhappy with how your information is handled, you can complain to the UK's Information Commissioner's Office, or to the data protection authority where you live.
Changes. If we change this notice, we will update the date at the top and, for significant changes, tell you in the app.
Contact. Email [email protected] or write to Glusoft Limited, Ednaston Park, Painters Lane, Ednaston, Ashbourne, Derbyshire DE6 3FA, United Kingdom.