Comparison

Modulo vs Number Sum Puzzle

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

Head to head
About

Modulo

Features
Read full description

Modulo is a calm, fast puzzle built on one idea: when a tile leaves one edge, it comes back on the other. Drag any row or column and the whole line wraps around. Put numbers, letters or colors back in order in as few moves as you can. • Daily puzzle: the same board for everyone, with a streak to keep • Adventure: 48 levels across four chapters, up to three stars each • Par: every board has a target move count worth chasing • Hints when you are stuck, unlimited undo, a calm Zen mode • Classic, Time Attack, Zen and a classic empty-tile Slide mode • Boards from 3x3 to 6x6 • Colorblind-friendly patterns, Dynamic Type, VoiceOver labels • Light and dark appearance, built for iPhone and iPad Free to play. Ads are rare, never in your first puzzles, and one purchase removes them for good.

About

Number Sum Puzzle

This logic puzzle game challenges your brain with number sums. Arrange numbers in a grid so rows and columns match target sums. Enjoy handcrafted puzzles with no timers or pressure, perfect for a calm, focused mental workout.

Highlights
  • Number sum grid puzzles
  • Handcrafted unique solutions
  • No timers or pressure
  • Offline play
  • Daily brain workout
  • Dark mode support
Features
Read full description

Challenge your brain with Sum Puzzle — the addictive number sums math puzzle loved by fans of Sudoku, Kakuro, and Nonogram. Remove numbers from the grid so the remaining values in each row and column add up exactly to the target sums on the edges. Simple rules. Infinite "aha!" moments. Every puzzle is handcrafted with one unique solution. No timers. No pressure. No mid-puzzle ads. Just pure logic and mental math — the perfect brain game for puzzle lovers who want a calm, focused challenge. HOW TO PLAY SUM PUZZLE • Each grid shows numbers with target sums displayed along the right side and the bottom. • Tap the check button to circle a number (marks it as kept in the sum). • Tap the erase button to remove a number from the grid. • Your goal: make every row and every column reach its exact target sum at the same time. • Every puzzle has one — and only one — correct solution. Can you find it? It sounds simple, but the deeper you go, the more you'll appreciate the elegant logic behind every layout. Start with a 3x3 warm-up, work your way to a 10x10 boss-level grid, and feel your mental math sharpen along the way. KEY FEATURES • Levels for Everyone — From quick 3x3 grids for complete beginners to sprawling 10x10 challenges for seasoned math puzzle experts. • Daily Brain Workout — Make it a daily habit. Sharpen focus, arithmetic speed, and pattern recognition a few minutes at a time. • Zero Mid-Puzzle Ads — We respect your concentration. Solve in peace. No interstitials pop up to break your flow. • Fully Offline — Play anywhere, anytime. No internet, no account, no sign-in. Perfect for flights, subways, and waiting rooms. • Dark-Mode Friendly — Sleek, minimalist design that's easy on the eyes day or night. Perfect for late-night brain training. • Handcrafted Puzzles — Every single level is hand-designed and verified for a unique, elegant solution. No auto-generated filler. • Endless Replay Value — Hundreds of logic puzzles with more added in regular updates. WHY YOU'LL LOVE SUM PUZZLE • Relax and Sharpen Your Mind — Stress-free gameplay built for calm focus. No timers. No streak shaming. No pay-to-win. Just pure logic. • Improve Mental Math — A natural workout for arithmetic speed, logical deduction, and pattern recognition. A real brain game, not a gimmick. • The Ultimate "Aha!" Moment — Feel that satisfying click when every number finally locks into place. • The Perfect Commute Companion — Fully offline puzzles for planes, trains, subways, and waiting rooms. No signal needed. • Kid-Friendly and Adult-Approved — Great for students learning arithmetic and adults looking for a mindful screen break. LOVE SUDOKU, KAKURO, OR NONOGRAM? If you enjoy logic puzzles like Sudoku, Kakuro (a.k.a. cross sums), or Nonogram, Sum Puzzle will feel instantly familiar — but with a fresh twist. It's the math puzzle game you didn't know you needed: simpler to learn than Kakuro, more satisfying than endless Sudoku grids, and more portable than pen and paper. WHO IT'S FOR • Puzzle lovers hunting for a fresh daily brain game • Students practicing mental math and arithmetic • Adults looking for a relaxing, screen-time-worthy brain workout • Commuters who want a real offline puzzle game • Sudoku and Kakuro fans searching for their next number puzzle obsession Whether you want a serious math challenge or a relaxing way to unwind, Sum Puzzle makes every number count. Every solve is a small victory for your brain. Download Sum Puzzle now — your next favorite number sums math puzzle game is waiting. No ads interrupt your solve. No internet required. Just logic, numbers, and your next "aha!" moment. -------------------- ■ Terms of Use -------------------- By downloading or using this app, you agree to our Terms of Use (End User License Agreement). This app uses Apple's standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Modulo4 screens
Number Sum Puzzle4 screens

Verdict

The call

Modulo and Number Sum Puzzle are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Modulo sells 1 one-off in-app purchase and Number Sum Puzzle sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Modulo ships an update every 9 days, Number Sum Puzzle every 5 days. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

ScorecardNo meaningful differences
Modulo versus Number Sum Puzzle: the parameters behind the verdict, then further details
ParameterModuloNumber Sum Puzzle
PriceFreeFree
Rating—3.8 (6 ratings) — better
Positive reviews—50.0% of reviews
Number of ratings—6 — better
Update frequencyEvery 9 daysEvery 5 days — better
AdsYesYes
In-app purchasesYesYes
Monetization—Ad-supported
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size82 MB138 MB
Age rating4+17+
DeveloperMehmet GuevenLIHUHU PUBLISHING PTE. LTD.

In-app purchases

1 purchases

Modulo

One-time1
  • Remove Ads$2.99
5 purchases

Number Sum Puzzle

One-time5
  • Starter Hints$1.99
  • Value Hints$5.99
  • Mega Hints$9.99
Show 2 more
  • VIP - No Ads$19.99
  • VIP - No Ads$49.99

Questions

Is Modulo free?
Modulo is free to download, with in-app purchases available.
Is Number Sum Puzzle free?
Number Sum Puzzle is free to download, with in-app purchases available.
Do Modulo or Number Sum Puzzle have ads?
Both Modulo and Number Sum Puzzle show ads.
Which is updated more often, Modulo or Number Sum Puzzle?
Modulo ships an update every 9 days, and Number Sum Puzzle every 5 days. Most recently, Modulo was updated on October 31, 2026 and Number Sum Puzzle on October 28, 2026.

Other comparisons