Cross Digits is a fantastic brain-teaser that bridges the gap between Crosswords and Sudoku. It’s a math-based puzzle game that feels incredibly rewarding when you finally balance a difficult equation. The grid-based layout is familiar, but the logic required is entirely unique.
It’s the kind of game that is perfect for a morning commute—it wakes your brain up without being overly stressful. The visual design is minimalist and clean, keeping the focus entirely on the numbers. If you enjoy Kakuro or KenKen, this is a must-download.
Available on: iPhone, iPad, iPod
Version 5.3Wed Jan 28 2026
Updated for iPhone 16.
Are you a number crossword puzzle expert?
Cross Digits is the crossword app where each word is a number. There are no hints; just your own skills of logic and deduction.
GAMEPLAY
Your objective: Fill the board with the correct numbers. Press the Check button when you’re sure about your choices.
• The board starts with some numbers filled in for you
• Reference the word list for numbers that cross the board, horizontally or vertically.
• Example: Tap the 5 to see all 5-digit numbers in the puzzle
• Place entire numbers or individual digits as you solve the puzzle
• Check the final board for victory!
FEATURES
Cross Digits doesn’t waste your time with useless “features”; it just works.
• Over 150 unique puzzles
• 4 difficulties - from Easy to Expert
• No subscription & no ads!
ARE YOU AN EXPERT?
To complete an Expert puzzle takes serious smarts. See if you can get a perfect score!
• Each number is extremely similar
• Only one number given on the board
• Every puzzle can be solved!
*** Need to try before you buy? Download Cross Digits Lite for 4 free puzzles. ***
Requires iOS 12.0 or later. Compatible with iPhone, iPad, and iPod touch.Are you a number crossword puzzle expert?
Cross Digits is the crossword app where each word is a number. There are no hints; just your own skills of logic and deduction.
GAMEPLAY
Your objective: Fill the board with the correct numbers. Press the Check button when you’re sure about your choices.
• The board starts with some numbers filled in for you
• Reference the word list for numbers that cross the board, horizontally or vertically.
• Example: Tap the 5 to see all 5-digit numbers in the puzzle
• Place entire numbers or individual digits as you solve the puzzle
• Check the final board for victory!
FEATURES
Cross Digits doesn’t waste your time with useless “features”; it just works.
• Over 150 unique puzzles
• 4 difficulties - from Easy to Expert
• No subscription & no ads!
ARE YOU AN EXPERT?
To complete an Expert puzzle takes serious smarts. See if you can get a perfect score!
• Each number is extremely similar
• Only one number given on the board
• Every puzzle can be solved!
*** Need to try before you buy? Download Cross Digits Lite for 4 free puzzles. ***








Cross Digits combines arithmetic with crossword-style logic. Players must fill in the blanks with numbers that satisfy the equations both horizontally and vertically. With varying difficulty levels, it’s an ideal way to sharpen your mental math skills.
Hundreds of unique math puzzles
Clean, distraction-free interface
Hints for when you are stuck
Daily brain training challenges
Focus on the intersections first. Finding a number that satisfies both a vertical and horizontal equation simultaneously is the key to unlocking the grid.
Progress from simple addition grids to complex puzzles involving multiplication and division.
Yes, it is an excellent tool for students to practice basic arithmetic in a fun, engaging way.