Comparison

String Theory Game vs NumCross Puzzle

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

Head to head
About

String Theory Game

A vibrant puzzle game where you recreate patterns by drawing loops between pegs. Strategically place and overlap loops to match the target design with minimal moves. Offers handcrafted puzzles, daily challenges, and endless free play.

Highlights
  • Pattern matching puzzles
  • Loop drawing mechanics
  • Color-based loop filling
  • 60+ handcrafted puzzles
  • Daily challenges
  • Free play modes
Features
Read full description

String Theory is a colorful puzzle game about matching a given pattern by building it out of different colored shapes. String theory has 60+ handcrafted puzzles, daily challenges, and free play modes, making for hours of fun. Draw lines between pegs to create loops. The loops fill in with a different color depending on how many pegs they touch. Any loop that touches either three pegs or six pegs turns green. Any loop that touches either four pegs or eight pegs turns purple. Any loop that touches either five pegs or seven pegs turns spotted purple. Replicating the given pattern with as few loops as possible requires strategic placement and overlapping of loops. With dozens of handcrafted patterns to match, and thousands additional free play patterns, String Theory is a mind-bending game filled to the brim with tricky puzzles to get the gears turning! No ads, no microtransactions.

About

NumCross Puzzle

Features
Read full description

NumCross - The Ultimate Number Logic Puzzle Game Dive into the fascinating world of NumCross, where numbers meet logic in challenging mathematical puzzles! Inspired by classic number grid puzzles, NumCross combines mathematics and deductive reasoning to create an engaging brain-training experience. HOW TO PLAY Fill the grid with numbers 1-9, using the hints provided for each row and column. Each hint describes a mathematical property or relationship that the numbers must satisfy: - Prime numbers - Perfect squares and cubes - Even or odd numbers - Palindromes - Ascending or descending digits - Arithmetic operations between words - And many more! No zeros allowed - every cell must contain a digit from 1 to 9. Use logic and mathematical knowledge to deduce which numbers belong where. FEATURES * Hundreds of Unique Puzzles Every puzzle is uniquely generated with a distinct three-word name for easy reference and sharing. * Five Grid Sizes Choose your challenge level with puzzles ranging from 2×2 to 6×6 grids. Start small and work your way up to master-level puzzles. * Auto-Save Progress Your progress is automatically saved. Switch between puzzles or close the app - you'll always pick up right where you left off. * Hint System Long-press any cell label to reveal its hint. The hint validation system shows you when you've correctly filled a word. * Candidate Mode Use candidate mode to track possible numbers for each cell - perfect for complex puzzles requiring careful deduction. * Share as PDF Generate beautiful PDF versions of any puzzle to share with friends or solve on paper. * Cheat Button Stuck? The cheat button will fill in one correct number to help you progress (use sparingly for the best challenge!). * Cross Out Hints Mark hints as completed to keep track of your progress and reduce visual clutter. * Multiple Languages Full support for 13 languages: English, German, French, Spanish, Portuguese, Simplified Chinese, Traditional Chinese, Hindi, Russian, Italian, Japanese, Korean, and Arabic. PERFECT FOR - Puzzle enthusiasts who love Sudoku, KenKen, and logic puzzles - Math lovers who enjoy number patterns and arithmetic - Anyone looking to improve their logical thinking and problem-solving skills - Students wanting to practice mental math in a fun way - Commuters seeking an offline brain-training activity WHY NUMCROSS? Unlike simple number-filling games, NumCross requires you to understand and apply mathematical concepts. Each puzzle is a unique challenge that exercises both your logical reasoning and numerical skills. The satisfaction of solving a difficult puzzle using pure logic is incredibly rewarding! DIFFICULTY LEVELS These puzzles are challenging, but solving them is deeply satisfying. Start with 2×2 grids to learn the mechanics, then progress to larger puzzles: - 2×2: Learn the basics with smaller grids - 3×3: Build your skills with moderate challenges - 4×4: Requires strategic thinking and patience - 5×5: Advanced puzzles that test your logic - 6×6: Master-level challenges for experienced solvers COMPLETELY OFFLINE Play anywhere, anytime - no internet connection required. All puzzles are stored locally on your device. TIPS FOR SUCCESS 1. Start with hints that have the most constraints (like "prime" or "palindrome") 2. Use candidate mode to track possibilities 3. Look for intersections where words cross - they must share the same digit 4. Cross out completed hints to focus on remaining challenges 5. Remember: no zeros! Every number must be 1-9 Download NumCross today and experience the joy of solving these clever mathematical puzzles!

Screenshots

String Theory Game4 screens
NumCross Puzzle4 screens

Verdict

The call

The clearest difference is iOS requirement: String Theory Game at 10.0 against NumCross Puzzle's 15.1. On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

String Theory Game ships an update every 2 days, NumCross Puzzle every 3 days. The most recent releases landed on September 7, 2026 and May 17, 2026 respectively.

Scorecard1 real difference · 8 level
String Theory Game versus NumCross Puzzle: the parameters behind the verdict, then further details
ParameterString Theory GameNumCross Puzzle
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 2 days — betterEvery 3 days
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better15.1
Further details — not scored
Size43 MB43 MB
Age rating4+4+
DeveloperAndrew ViestaJENS WOLF WEIGEL

In-app purchases

None

String Theory Game

No in-app purchases

None

NumCross Puzzle

No in-app purchases

Questions

Is String Theory Game free?
String Theory Game is free to download, with no in-app purchases.
Is NumCross Puzzle free?
NumCross Puzzle is free to download, with no in-app purchases.
Do String Theory Game or NumCross Puzzle have ads?
Neither String Theory Game nor NumCross Puzzle shows ads.
Which is updated more often, String Theory Game or NumCross Puzzle?
String Theory Game ships an update every 2 days, and NumCross Puzzle every 3 days. Most recently, String Theory Game was updated on September 7, 2026 and NumCross Puzzle on May 17, 2026.

Other comparisons