477 reviews
Content rating
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Screenshot image
Screenshot image

About this game

Privacy Friendly Sudoku is a logic puzzle game. The goal is to fill the complete board with numbers. Every number may only occur once in every column, row and subsection.

Privacy Friendly Sudoku has three different game modes:
1. a 6x6 game field with 2x3 subsections
2. a 9x9 game field with 3x3 subsections
3. a 12x12 game field with 3x4 subsections

For each game mode there are four different difficulty levels, that are not measured by the number of set values but rather by the solving strategies needed to solve the game. The generator always tries to provide a game that has the minimum amount of set values, that are needed to solve the game.

Our Privacy Friendly App differs from other applications with respect to two aspects:
1. The Privacy Friendly Sudoku App does not use any permission.
2. The Privacy Friendly Sudoku App completely relinquishes advertisement.
Many other free apps in the Google Play Store dazzle annoying advertising and also shortens battery life.

You can reach us via
Twitter - @SECUSOResearch (https://twitter.com/secusoresearch)
Mastodon - @SECUSO_Research@bawü.social (https://xn--baw-joa.social/@SECUSO_Research/)
Job opening - https://secuso.aifb.kit.edu/english/Job_Offers_1557.php
Updated on
Nov 8, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

Ratings and reviews

418 reviews
A Google user
December 27, 2018
Love the fact that this app requires no permissions and would gladly even pay for it. Downside is on the two hardest settings, many times the puzzles are not solvable without guessing after getting so far. Even with adding notations, you essentially need to remember when you started guessing and then if you guessed wrong, hit undo until you started the guess and then change it. IMO, it takes the fun out of it.
12 people found this review helpful
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Mark Robison
June 5, 2021
I've been using this app since 2016. It's the best Sudoku game I've come across yet. No ads, no internet access needed. Unlimited games, choose your difficulty level, it works flawlessly. Highly recommend! 2021 update. Now the numbers change from blue to green as each number is completely solved. I love this enhancement. My clearing time is definitely helped by this improvement. Thanks to the devs. I didn't think you could improve on an already awesome game but you did. Still my favorite sudoku!
7 people found this review helpful
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Mikael M
November 13, 2020
The newest update to the graphics ruined the game. The gamefield is now only about half the screen so it's really easy to miss the intented square. Also the little numbers are so small they can hardly be seen. To add to the problem they changed the highlight color from yellow to dark orange so it's nearly impossible to see the little numbers when highlighted. Why on earth did you change it?
6 people found this review helpful
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What's new

Fixes a bug leading to crashes on Android 7.