Comparison

RiddleSum vs Number Sum Up

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

Head to head
About

RiddleSum

This number puzzle game challenges you to balance rows and columns by selecting the correct numbers. It offers a relaxing, clean design with hundreds of handcrafted puzzles to sharpen logic and mental math skills at your own pace.

Highlights
  • Hundreds of handcrafted puzzles
  • Clean and minimal design
  • Helpful hints
  • No timers, solve at your own pace
  • Daily brain workout
  • Logic and mental math training
Features
Read full description

RiddleSum is a clean and addictive number puzzle where your goal is to balance every row and column. Pick the right numbers, remove the wrong ones, and make all sums match the clues on the edges. Simple at first glance - surprisingly deep once you start playing. Every puzzle has one single correct solution. Analyze, eliminate, and find the perfect combination that works in all directions at the same time. It’s a great way to sharpen your logic, focus, and mental math skills. How to play: • Check the target sums for each row and column. • Cross out numbers that can’t be part of the solution. • Keep only the numbers that complete the total. • Solve boards from 3×3 up to 9×9. Features: • Hundreds of handcrafted number puzzles. • Clean and minimal design that feels relaxing. • Helpful hints when you’re stuck. • No timers, no pressure — solve at your own pace. • A subtle daily workout for your brain and arithmetic. If you love smart logic puzzles and satisfying “aha!” moments, RiddleSum is perfect for your daily brain routine. Enjoy solving beautifully simple number challenges anywhere, anytime.

About

Number Sum Up

Solve number puzzles by circling and erasing digits to make rows and columns add up to target sums. This game offers a clean design and varying difficulty levels to sharpen your mental math skills.

Highlights
  • Circle and erase numbers
  • Solve row and column sum puzzles
  • Multiple difficulty levels
  • Varying board sizes
  • Hint system
  • Clean and simple design
Features
Read full description

Get ready to boost your brainpower and have a blast with Number Sum Up: Quick Math, the addictive math puzzle game that’s perfect for all ages! Number Sums is your ticket to mental math mastery! Solve puzzles by circling the right numbers and erasing the ones you don’t need. Your goal is to make each row and column add up to the clues on the side of the board. It’s simple, challenging, and oh-so-satisfying! Being good at mental math is useful in everyday life. Number Sum Up: Quick Math, you’ll find math puzzles that range from easy to hard. The game is simple to understand but takes careful thinking to solve. Playing these number games can help improve your math skills. If you enjoy number puzzles or free math games for adults, and want to practice your addition skills, try this fun and engaging game for hours of entertainment! How To Play: Circle the numbers that add up to the targets shown at the ends of each row and column. Use the toggle to change between circling and erasing. This helps you keep the right numbers and remove the extras. Each puzzle has only one solution. Make sure all rows and columns add up correctly. Practice addition with this free game, featuring different board sizes from 4x4 to 8x8 and varying difficulty levels. Tips to Improve Your Skills in Number Sum Up: Quick Math: Erase Large Numbers: First, remove numbers from the board that are bigger than the target sums. Odd and Even: If a row or column has only one odd number and the target sum is even, remove that odd number. Check Largest Number: If the biggest number on the board doesn’t match the target sum, add the smallest number to it. If the total is too high, erase the largest number. Benefits of Playing Number Sum Up: Quick Math: Enjoy many number puzzles that challenge your brain and improve your math skills. Experience a clean and simple design that makes playing enjoyable. Use hints when you get stuck to solve the puzzles. Play at your own pace and take your time to find the single correct solution. Why You’ll Love Number Sum Up: Quick Math: If you like addictive games like Number Match: Match Ten 10, you’ll love Number Sum Up: Quick Math. Play it anywhere, anytime to improve your math and logic skills!

Screenshots

RiddleSum4 screens
Number Sum Up4 screens

Verdict

The call

RiddleSum and Number Sum Up both sit at 4.6 stars, but that hides the real split: 100% of Number Sum Up's written reviews are positive against 0% of RiddleSum's. Number Sum Up also leads on ads (none vs shown) and update cadence (every 3 days vs every 2 months). RiddleSum's advantage is monetization model (ad-supported vs free with in-app purchases). On price, rating, ratings volume and in-app purchases 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. RiddleSum sells 1 one-off in-app purchase and Number Sum Up sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for RiddleSum against 4.6 for Number Sum Up. Both are backed by a comparable volume of ratings — 10 and 19 respectively. Written reviews are what separate them: 0% of RiddleSum's written reviews are positive against 100% of Number Sum Up's.

UpkeepUpdate frequency

RiddleSum ships an update every 2 months, Number Sum Up every 3 days. The most recent releases landed on September 15, 2026 and September 9, 2026 respectively.

Scorecard6 real differences · 4 level
RiddleSum versus Number Sum Up: the parameters behind the verdict, then further details
ParameterRiddleSumNumber Sum Up
PriceFreeFree
Rating4.6 (10 ratings)4.6 (19 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings1019 — better
Update frequencyEvery 2 monthsEvery 3 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.012.0 — better
Further details — not scored
Size20 MB197 MB
Age rating4+4+
DeveloperDmitriy RomanovALICE GAMES

Customer experience

RiddleSum

All ratings10 ratings
Positive90.0%
Neutral10.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

Number Sum Up

All ratings19 ratings
Positive94.7%
Neutral0.0%
Negative5.3%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

RiddleSum

One-time1
  • Remove Ads$2.99
1 purchases

Number Sum Up

One-time1
  • Remove Ads$3.99

Questions

Is RiddleSum free?
RiddleSum is free to download, with in-app purchases available.
Is Number Sum Up free?
Number Sum Up is free to download, with in-app purchases available.
Which has better reviews, RiddleSum or Number Sum Up?
Number Sum Up is rated higher. RiddleSum averages 4.6 out of 5 from 10 ratings, while Number Sum Up averages 4.6 from 19 ratings.
Do RiddleSum or Number Sum Up have ads?
RiddleSum shows ads; Number Sum Up does not.
Which is updated more often, RiddleSum or Number Sum Up?
RiddleSum ships an update every 2 months, and Number Sum Up every 3 days. Most recently, RiddleSum was updated on September 15, 2026 and Number Sum Up on September 9, 2026.

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