Comparison

ClueKeeper vs Sumaddle

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

Head to head
About

ClueKeeper

Design and participate in interactive clue hunts that guide players through locations with puzzles and challenges. Explore your surroundings in new ways, even offline, with augmented reality features.

Highlights
  • Create custom clue hunts
  • Solve puzzles and riddles
  • Augmented reality clues
  • Offline play support
  • Explore surroundings
  • Play sample hunts
Features
Read full description

ClueKeeper is a powerful platform for creating and playing clue hunts! What's a clue hunt? A clue hunt is a game in which the players solve clues that lead them from one to the next. The clues can be straightforward questions, physical challenges, clever puzzles or riddles, or whatever else the hunt creator can imagine. With the help of our friends from Zappar, we even support augmented reality clues! A hunt might send players searching around their local park, through the best-kept secret spots of their city, or even across state lines. ClueKeeper hunts provide a great way to have fun and explore your surroundings in a new and exciting way! Our app even works offline, allowing you to explore off-the-beaten path areas without a consistent cell connection. To get started, try out the sample hunt "Welcome to ClueKeeper"!

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

ClueKeeper4 screens
Sumaddle3 screens

Verdict

The call

The clearest difference is in-app purchases: ClueKeeper at none against Sumaddle's 15. ClueKeeper also leads on iOS requirement (13.0 vs 17.0). Sumaddle's advantage is review sentiment (95% vs 67%) and rating (4.9 vs 4.6). On price, 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

Both are free to download. Sumaddle sells 15 one-off in-app purchases. ClueKeeper asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Sumaddle holds the better App Store score, 4.9 against 4.6. That said, the two scores are not equally well evidenced: Sumaddle has 769 ratings behind it against 20, so its average is the more settled of the two. Written reviews point the same way: 67% of ClueKeeper's written reviews are positive against 95% of Sumaddle's.

UpkeepUpdate frequency

ClueKeeper ships an update every 3 months, Sumaddle every 3 weeks. The most recent releases landed on October 8, 2026 and October 20, 2026 respectively.

Scorecard7 real differences · 3 level
ClueKeeper versus Sumaddle: the parameters behind the verdict, then further details
ParameterClueKeeperSumaddle
PriceFreeFree
Rating4.6 (20 ratings)4.9 (769 ratings) — better
Positive reviews66.7% of reviews94.9% of reviews — better
Number of ratings20769 — better
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size28 MB31 MB
Age rating4+4+
DeveloperClueKeeper LLCJonathan Buchanan

Customer experience

ClueKeeper

All ratings20 ratings
Positive90.0%
Neutral0.0%
Negative10.0%
Written reviews15 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Sumaddle

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

Bugs and requests

ClueKeeper

Not enough reviews yet to summarise bugs or 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

In-app purchases

None

ClueKeeper

No 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

Questions

Is ClueKeeper free?
ClueKeeper is free to download, with no in-app purchases.
Is Sumaddle free?
Sumaddle is free to download, with in-app purchases available.
Which has better reviews, ClueKeeper or Sumaddle?
Sumaddle is rated higher. ClueKeeper averages 4.6 out of 5 from 20 ratings, while Sumaddle averages 4.9 from 769 ratings.
Do ClueKeeper or Sumaddle have ads?
Neither ClueKeeper nor Sumaddle shows ads.
Which is updated more often, ClueKeeper or Sumaddle?
ClueKeeper ships an update every 3 months, and Sumaddle every 3 weeks. Most recently, ClueKeeper was updated on October 8, 2026 and Sumaddle on October 20, 2026.

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