Comparison

Sumaddle vs DropRXN

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

Head to head
About

Sumaddle

This logic puzzle game transforms pencil-and-paper challenges into interactive brain teasers. Fit number combinations to clues using pure logic, with no mental arithmetic required. Enjoy over 150 free puzzles of varying difficulty, with built-in help and offline play.

Highlights
  • Interactive logic puzzles
  • Number combination fitting
  • Pure logic solving
  • Built-in help and mistake correction
  • Over 150 free puzzles
  • Offline play
  • Ad-free experience
Features
Read full description

• “Brilliant puzzle game”, UK App Store review Apr 2025 • “Best Puzzle Game I’ve Ever Played”, US App Store review Jan 2025 • “The ONLY iOS game I've never gotten tired of”, Reddit review Apr 2024 This type of logical puzzle was first seen in the Japan Puzzle Championship 2006 and is sometimes known as Doppelblock, or Smashed Sums. When played with pencil and paper, these puzzles can be hard work to solve. Sumaddle changes that by adding the essential element of interaction. This transforms the puzzles into intriguing brain teasers that unfold before your eyes. Each puzzle has a unique solution. Finding the solution involves fitting the number combinations to the clues. The app makes it easy to view the possible combinations, you don’t need to do any sums in your head. Instead, you can focus on using logic to narrow down the combinations and find a fitting arrangement. Some reasons why you will enjoy playing Sumaddle: • puzzles range in size and difficulty from small and simple to large and mind-blowing • more than 150 puzzles are included for free • all puzzles can be solved with pure logic, no mental arithmetic required • the sophisticated built-in help can explain the logical reasoning at each step and also fix mistakes if you go wrong • the built-in help is completely free, use it as much as you like • works offline (great for long journeys) • a high standard of accessibility, including comprehensive support for VoiceOver • ad-free play - there are absolutely no ads! IGRS age rating (Indonesia Game Rating System): 3+ Designed and developed in Winterthur, Switzerland

About

DropRXN

Engage in a strategic ball-dropping game where you match rows and columns based on dropping numbers. Trigger chain reactions to achieve high scores and test your luck against random chance. Enjoy customizable settings and a unique gameplay experience.

Highlights
  • Ball-dropping puzzle gameplay
  • Match rows and columns
  • Chain reaction scoring
  • Multiple difficulty levels
  • Customizable settings
  • Pithy rejoinders
Features
Read full description

A game where you match wits against the fickle whims of random chance. Match rows and columns according to the number on the balls as they drop into the grid. Create satisfying point-scoring chain reactions to get the highest score. Features: Fast-paced ball-dropping action! Select 5 different difficulty levels! Change Settings, including background music! Pithy rejoinders! This game is a labor of love. A hobby I developed in my spare time just to see if I can do it. Try not to expect too much. Rated IGRS 3+ in Indonesia.

Screenshots

Sumaddle3 screens
DropRXN4 screens

Verdict

The call

The clearest difference is price: Sumaddle at Free against DropRXN's $0.99. Sumaddle also leads on update cadence (every 3 weeks vs every 25 months) and ratings volume (767 vs 2). DropRXN's advantage is in-app purchases (none vs 15) and iOS requirement (12.0 vs 16.0). On rating, ads and device support 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

Sumaddle is free to download; DropRXN costs $0.99 up front. Sumaddle sells 15 one-off in-app purchases. DropRXN asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Sumaddle against 5.0 for DropRXN. That said, the two scores are not equally well evidenced: Sumaddle has 767 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Sumaddle ships an update every 3 weeks, DropRXN every 25 months. The most recent releases landed on September 25, 2026 and June 1, 2026 respectively.

Scorecard6 real differences · 4 level
Sumaddle versus DropRXN: the parameters behind the verdict, then further details
ParameterSumaddleDropRXN
PriceFree — better$0.99
Rating4.9 (767 ratings)5.0 (2 ratings) — better
Positive reviews94.9% of reviews—
Number of ratings767 — better2
Update frequencyEvery 3 weeks — betterEvery 25 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.012.0 — better
Further details — not scored
Size30 MB165 MB
Age rating4+4+
DeveloperJonathan BuchananJames Mundie

Customer experience

Sumaddle

All ratings767 ratings
Positive98.3%
Neutral0.7%
Negative1.0%
Written reviews98 reviews
Positive94.9%
Neutral1.0%
Negative4.1%

DropRXN

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Sumaddle

Reported bugs

2 issues
  • Losing progress when minimizing the app
  • Inconsistent difficulty ratings

Requested features

4 requests
  • Ability to selectively pencil in notes
  • More difficult puzzle options
  • Synced progress across devices
  • Detailed statistics and leaderboard

DropRXN

Not enough reviews yet to summarise bugs or requests.

In-app purchases

15 purchases

Sumaddle

One-time15
  • Quirky, Pack 5$0.99
  • Very Difficult Puzzles$0.99
  • Quirky, Pack 1$0.99
Show 12 more
  • Premium 9x9 Puzzles, Pack 1$0.99
  • Crafty, Pack 1$0.99
  • Crafty, Pack 2$0.99
  • Crafty, Pack 3$0.99
  • Sneaky, Pack 1$0.99
  • Sneaky, Pack 2$0.99
  • Sneaky, Pack 3$0.99
  • Tricky, Pack 1$0.99
  • Tricky, Pack 2$0.99
  • Tricky, Pack 3$0.99
  • Assorted Puzzles$0.99
  • Puzzle Generator$9.99
None

DropRXN

No in-app purchases

Questions

Is Sumaddle free?
Sumaddle is free to download, with in-app purchases available.
Is DropRXN free?
DropRXN costs $0.99, with no in-app purchases.
Which has better reviews, Sumaddle or DropRXN?
DropRXN is rated higher. Sumaddle averages 4.9 out of 5 from 767 ratings, while DropRXN averages 5.0 from 2 ratings.
Do Sumaddle or DropRXN have ads?
Neither Sumaddle nor DropRXN shows ads.
Which is updated more often, Sumaddle or DropRXN?
Sumaddle ships an update every 3 weeks, and DropRXN every 25 months. Most recently, Sumaddle was updated on September 25, 2026 and DropRXN on June 1, 2026.

Other comparisons