Comparison

Sudoku.online vs Bolt Master

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Sudoku.online

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Play Free Sudoku Online Calling all puzzle lovers and online gaming enthusiasts! Put your problem-solving skills to the test with Sudoku Online, a brand new, free-to-play Sudoku app. We offer classic Sudoku puzzles in a range of difficulty levels. Discover Sudoku Games for Every Level Whether you’re a total beginner or a seasoned Sudokuist, our six modes of difficulty ensure players of all abilities can join in the fun. The “Easy” and “Casual” levels allow 6 or 5 mistakes, respectively, giving you plenty of room for trial and error while getting to grips with the rules. Meanwhile, those with prior experience but are a little out of practice, as well as experienced players who aren’t yet ready to join the big leagues, can opt for “Medium” or “Hard” difficulty. Those up for the challenge can take on the “Expert” and “Impossible Levels”. The latter has just 5-15% of cells filled, and doesn’t allow for a single mistake. Suitable for the most savvy and experienced players, these top two levels are the ultimate way to test out your Sudoku skills. Dive Into Our Sudoku Puzzle Collection Start Your Sudoku Journey Our first two levels are perfect for players starting out on their Sudoku journey. Designed specifically for beginners, the “Easy” level pre-fills at least 30-40% of cells before the game starts. In reality, many puzzles actually begin with even more than this filled in, so you only need to figure out the last few remaining figures. With half the puzzle already completed and room for more mistakes than you can count on one hand, there’s no better way to learn Sudoku than playing our “Easy” level. We want to help every player enhance their skills, which is why we offer gaming statistics, instructions and tips, personal ratings, feedback and support. Challenge Yourself with Advanced Puzzles If you find yourself quickly completing the easier levels and are looking for a challenge, why not try out some of our harder puzzles? Ranging from “Medium” to “Impossible”, these increasingly tricky Sudokus will really put your skills (and patience) to the test. The levels are as follows: Medium - 3 mistakes, 20-30% of cells are filled; Hard - 2 mistakes, 15-25% of cells are filled; Expert - 10-20% of cells are filled; Impossible - 0 mistakes, 5-15% of cells are filled. Though each “Impossible” game ends after your first mistake, the fun doesn’t really stop there. We don’t put a limit on the number of free Sudoku games you can play in a day, so you can get back up and try again as many times as you’d like. Additional features: Undo Action: Made a mistake? No problem! Use the undo action feature to go back a step and correct your actions. Color Themes: Customize the look of the game with various color themes. Choose a theme that suits you best and enjoy playing in a stylish environment. Highlighting Rows, Columns, or Blocks: Help yourself find the right numbers faster by highlighting rows, columns, or blocks. This feature makes the game more convenient and efficient. Eraser: Made a wrong move? Use the eraser to remove incorrectly placed numbers and continue solving the puzzle without unnecessary obstacles. Features: Wide Variety of Number Puzzles: Enjoy a plethora of number puzzles to challenge your mind. 9x9 Grid: Dive into the classic 9x9 grid layout, perfect for a traditional Sudoku experience. 6 Balanced Difficulty Levels: Choose from six carefully balanced difficulty levels, ensuring a challenge for every skill level. Smartphone and Tablet Support: Play seamlessly across your smartphone and tablet devices, providing flexibility and convenience wherever you are.

About

Bolt Master

Features
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A brain-twisting puzzle game with fab graphics - no time limits, no move limits! "Bolt Master" is a fresh new puzzle game to exercise your brain - at your own pace! Get ready for an exciting adventure filled with mind-bending puzzles and realistic physics and sounds. Remove pieces by moving the bolts to empty holes. A level is clear when all the pieces have fallen. The advanced physics let you move bolts to any hole where the bolt will fit - even if it's partially under a swinging piece! Thousands of levels to conquer and a unique daily challenge every day to keep your skills up! How to play: - Remove pieces by moving bolts to empty holes. - The professor will guide you through the first stages. - Complete levels at your own pace. - Includes a unique daily challenge each day as well as the main levels. Features: - No move limits and no time limits. - Includes 2000+ levels. - Beautifully styled graphics so you can see exactly what is going on! - Optional full undo history if you make a mistake. - Optional hammer to remove a bolt if you get completely stuck. - There is no luck element in solving a level. - Gather coins in exciting daily challenges. Tips: - The daily challenges can be more difficult than the standard levels initially. - There's often multiple ways to remove pieces. - If you're stuck, try a different way! - All levels can be completed without using optional undos or hammer. - To make a piece swing you usually move the bottom bolt last. - A bolt is slightly smaller than the holes, so it can fit even if not quite perfectly aligned. - If pieces are swinging around, time your move carefully. Need any help? Email us at info@gamewareeurope.com

Screenshots

Sudoku.online4 screens
Bolt Master4 screens

Verdict

The call

The clearest difference is in-app purchases: Sudoku.online at none against Bolt Master's 1. Sudoku.online also leads on ads (none vs shown) and update cadence (every 3 days vs every 7 months). On price and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Bolt Master sells 1 one-off in-app purchase. Sudoku.online asks for nothing beyond the download.

UpkeepUpdate frequency

Sudoku.online ships an update every 3 days, Bolt Master every 7 months. Both last shipped on October 30, 2026.

Scorecard4 real differences · 2 level
Sudoku.online versus Bolt Master: the parameters behind the verdict, then further details
ParameterSudoku.onlineBolt Master
PriceFreeFree
Update frequencyEvery 3 days — betterEvery 7 months
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size416 MB388 MB
Age rating4+4+
DeveloperEDEV GROUP LIMITEDGameware Europe Ltd

In-app purchases

None

Sudoku.online

No in-app purchases

1 purchases

Bolt Master

One-time1
  • Remove Adverts$4.99

Questions

Is Sudoku.online free?
Sudoku.online is free to download, with no in-app purchases.
Is Bolt Master free?
Bolt Master is free to download, with in-app purchases available.
Do Sudoku.online or Bolt Master have ads?
Bolt Master shows ads; Sudoku.online does not.
Which is updated more often, Sudoku.online or Bolt Master?
Sudoku.online ships an update every 3 days, and Bolt Master every 7 months. Most recently, Sudoku.online was updated on October 30, 2026 and Bolt Master on October 30, 2026.

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