Comparison

Uncrossed vs Sumaddle

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

Head to head
About

Uncrossed

Rearrange dots in this calming puzzle game to untangle lines and prevent them from crossing. It offers a range of difficulty levels, from easy to impossible, to sharpen your mind and build interesting patterns.

Highlights
  • Untangle lines puzzle
  • Rearrange dots
  • Difficulty levels
  • Sharpen mind
  • Build patterns
Features
Read full description

In this calming puzzle game you rearrange dots so that none of the connected lines cross. •Difficulty levels from easy to impossible •Sharpen your mind with this tricky brain game •Build interesting patterns and designs •Fun for all ages. (Reinforces geometry and math concepts) Can you solve an impossible puzzle?

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

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 transforming the puzzles into interactive 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 are able to focus on using logic to narrow down the combinations and find a fitting arrangement. The puzzles come in a range of sizes and difficulties, to suit all levels of skill and puzzling purposes. Choose a small puzzle to idle away a minute or two while waiting in a queue, or a big puzzle to give your brain some exercise during a coffee break! Some reasons why you will enjoy playing Sumaddle: • 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

Screenshots

Uncrossed3 screens
Sumaddle3 screens

Verdict

The call

The clearest difference is update cadence: Sumaddle at every 3 weeks against Uncrossed's every 10 months. Sumaddle also leads on review sentiment (95% vs 74%). Uncrossed's advantage is iOS requirement (12.0 vs 17.0). 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. Uncrossed sells 1 one-off in-app purchase and Sumaddle sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Sumaddle holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 412 and 769 respectively. Written reviews point the same way: 74% of Uncrossed's written reviews are positive against 95% of Sumaddle's.

UpkeepUpdate frequency

Uncrossed ships an update every 10 months, Sumaddle every 3 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard3 real differences · 7 level
Uncrossed versus Sumaddle: the parameters behind the verdict, then further details
ParameterUncrossedSumaddle
PriceFreeFree
Rating4.7 (412 ratings)4.9 (769 ratings) — better
Positive reviews73.9% of reviews94.9% of reviews — better
Number of ratings412769 — better
Update frequencyEvery 10 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better17.0
Further details — not scored
Size48 MB31 MB
Age rating4+4+
DeveloperMICHAEL ECONOMYJonathan Buchanan

Customer experience

Uncrossed

All ratings412 ratings
Positive95.6%
Neutral2.9%
Negative1.5%
Written reviews23 reviews
Positive73.9%
Neutral4.3%
Negative21.7%

Sumaddle

All ratings769 ratings
Positive98.3%
Neutral0.7%
Negative1.0%
Written reviews98 reviews
Positive94.9%
Neutral1.0%
Negative4.1%

User reviews

Uncrossed

From 412 App Store ratings

What we love

  • 👍 Fun and engaging gameplay
  • 💡 Simple yet challenging puzzles
  • 🧘 Zen-like meditative experience
  • ✨ Clean and unobtrusive interface
  • 🚀 Ads are fair and bearable

Room to improve

  • 💸 Paid ads removal is ineffective
  • 📉 Very few levels
  • 😩 Puzzles lack diversity
  • 💡 Bright screen for night play

Sumaddle

From 769 App Store ratings

What we love

  • 👍 Fun and challenging game
  • 👍 Clean and intuitive interface
  • 👍 Helpful hint system
  • 🚀 No ads or data collection
  • 💡 Unique puzzle concept

Room to improve

  • 🐛 Automatic hints can be intrusive
  • 🐛 Inability to replay completed puzzles
  • 💡 Need more free/sample puzzles
  • 💡 Difficulty progression could be improved

Bugs and requests

Uncrossed

Reported bugs

2 issues
  • Ads still present after purchase
  • Paid ad removal doesn't work

Requested features

2 requests
  • Provide solutions for puzzles
  • Add a dark mode option

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

In-app purchases

1 purchases

Uncrossed

One-time1
  • Disable Ads$0.99
10 purchases

Sumaddle

One-time10
  • Crafty, Pack 1$0.99
  • Crafty, Pack 2$0.99
  • Crafty, Pack 3$0.99
Show 7 more
  • 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
  • Puzzle Generator$9.99

Questions

Is Uncrossed free?
Uncrossed is free to download, with in-app purchases available.
Is Sumaddle free?
Sumaddle is free to download, with in-app purchases available.
Which has better reviews, Uncrossed or Sumaddle?
Sumaddle is rated higher. Uncrossed averages 4.7 out of 5 from 412 ratings, while Sumaddle averages 4.9 from 769 ratings.
Do Uncrossed or Sumaddle have ads?
Neither Uncrossed nor Sumaddle shows ads.
Which is updated more often, Uncrossed or Sumaddle?
Uncrossed ships an update every 10 months, and Sumaddle every 3 weeks. Most recently, Uncrossed was updated on November 2, 2026 and Sumaddle on November 3, 2026.

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