Comparison

Ripple Effect vs Index Sums

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

Head to head
About

Ripple Effect

A logic puzzle game where players fill grids with consecutive integers based on room size. It features rules about number placement to ensure separation between identical digits in rows and columns.

Highlights
  • Consecutive integer placement
  • Room-based puzzle mechanics
  • Row and column separation rules
  • Challenging logic puzzles
  • Grid-based gameplay
Features
Read full description

Ripple Effect is popular logic puzzle game in Japan. The solver must place one positive integer into each cell of the grid according to these rules: Every room must contain the consecutive integers from 1 to the quantity of cells in that room inclusive. If two identical numbers appear in the same row or column, at least that many cells with other numbers must separate them. For example, two cells both containing '1' may not be orthogonally adjacent, but must have at least one cell between them with a different number. Two cells marked '3' in the same row or column must have at least three cells with other numbers between them in that row or column, and so on.

About

Index Sums

Engage your mind with a Japanese number logic puzzle. Fill grids based on row and column sums, using pure logic to reveal hidden patterns. Offers multiple difficulty levels and daily challenges for continuous mental stimulation.

Highlights
  • Row and column sum logic puzzles
  • Multiple difficulty levels
  • Daily challenges
  • Progress tracking and statistics
  • Offline play
  • Customizable themes
  • Haptic feedback
Features
Read full description

Challenge your mind with Index Sums (Kakurasu), an elegant Japanese number logic puzzle that combines the best of Sudoku and Nonograms! HOW TO PLAY: • Fill in the grid based on row and column sums • Use logic to determine which cells should be filled • Complete the puzzle to reveal a hidden pattern • No guessing required - pure logic and deduction! KEY FEATURES: • Multiple difficulty levels (Easy, Medium, Hard) • Daily challenges to keep your mind sharp • Track your progress and statistics • Beautiful, minimalist design • Dark mode support • Offline play capability • Customizable themes and colors • Haptic feedback for better interaction BENEFITS: • Mental Agility: Challenge your logical thinking and problem-solving skills • Focus & Concentration: Practice maintaining focus through engaging puzzles • Pattern Recognition: Develop your ability to spot patterns and make quick decisions • Stress Relief: A relaxing way to unwind while keeping your mind active • Daily Challenge: Build a fun routine with daily puzzles • Progress Tracking: Monitor your improvement over time GAME MODES: • Classic Mode: Solve at your own pace • Daily Puzzles: New challenges every day • Practice Mode: Learn the basics FEATURES: • Intuitive touch controls • Haptic feedback • Progress tracking and statistics • Level progression system • Share your achievements • No ads or interruptions • Regular updates with new features Whether you're a puzzle enthusiast or looking to improve your logical thinking, Index Sums offers the perfect blend of challenge and satisfaction. Download now and join thousands of players in this addictive number logic puzzle!

Screenshots

Ripple Effect4 screens
Index Sums4 screens

Verdict

The call

Ripple Effect and Index Sums both sit at 5.0 stars, but that hides the real split: 100% of Index Sums's written reviews are positive against 30% of Ripple Effect's. Index Sums also leads on update cadence (every 3 weeks vs every 24 months). Ripple Effect's advantage is iOS requirement (8.0 vs 17.6). On price, rating, ratings volume and ads 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.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Ripple Effect against 5.0 for Index Sums. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews are what separate them: 30% of Ripple Effect's written reviews are positive against 100% of Index Sums's.

UpkeepUpdate frequency

Ripple Effect ships an update every 24 months, Index Sums every 3 weeks. The most recent releases landed on June 1, 2026 and June 24, 2026 respectively.

Scorecard3 real differences · 7 level
Ripple Effect versus Index Sums: the parameters behind the verdict, then further details
ParameterRipple EffectIndex Sums
PriceFreeFree
Rating5.0 (3 ratings)5.0 (3 ratings)
Positive reviews30.0% of reviews100.0% of reviews — better
Number of ratings33
Update frequencyEvery 24 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS8.0 — better17.6
Further details — not scored
Size16 MB25 MB
Age rating4+4+
DeveloperYuki FujimotoZORIX LLC

Customer experience

Ripple Effect

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive30.0%
Neutral40.0%
Negative30.0%

Index Sums

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Ripple Effect

No in-app purchases

None

Index Sums

No in-app purchases

Questions

Is Ripple Effect free?
Ripple Effect is free to download, with no in-app purchases.
Is Index Sums free?
Index Sums is free to download, with no in-app purchases.
Which has better reviews, Ripple Effect or Index Sums?
Ripple Effect and Index Sums are both rated 5.0 out of 5 on the App Store, from 3 and 3 ratings respectively.
Do Ripple Effect or Index Sums have ads?
Neither Ripple Effect nor Index Sums shows ads.
Which is updated more often, Ripple Effect or Index Sums?
Ripple Effect ships an update every 24 months, and Index Sums every 3 weeks. Most recently, Ripple Effect was updated on June 1, 2026 and Index Sums on June 24, 2026.

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