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Sufuku vs SizeItUp

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Sufuku compared with SizeItUp
DetailSufuku logo SufukuSizeItUp logo SizeItUp
What it doesA daily logic puzzle where each number repeats as many times as its value A free daily size comparison game about your sense of scale
StageNot given Not given
FoundedNot given Not given
Based inNot given US
Pricing modelNot given Free
PricingNot given Not given
Key features
  • 6×6 board with rows, columns and regions
  • Each number appears as many times as its value
  • One solution per puzzle
  • Gold clue numbers
  • New puzzle daily at 2:00 AM
  • Five daily games with unique themes and leaderboards
  • Interactive resizing with visual feedback
  • Sourced answers with links to primary sources
  • Daily leaderboard ranking system
  • Unlimited free play mode
  • Archive to replay past puzzles
  • Google account sign-in for streak tracking
  • Scoring system based on accuracy ratio
  • Cosmetic customization with titles and board themes
What makes it different
  • Pure deduction with no guessing required
  • Progressive difficulty throughout the week
  • Constraint-based puzzle mechanics where numbers repeat by value
  • Every size is sourced to primary references like NASA, ISO standards, and peer-reviewed studies
  • Real size visual comparison without conversion to other units
  • Fair scoring based on ratio rather than absolute difference
  • Completely free with no pay-to-win mechanics
  • Five diverse game categories spanning everyday, cosmic, prehistoric, culinary and microscopic scales
Community votes00
DR (Domain Rating by Ahrefs)2 −1 (down) since last check13 +10 (up) since last check
Trust Flow (Majestic)30
Citation Flow (Majestic)230
Referring domains (Majestic)270

3 details filled in for both companies.

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