Comparison

Calculation Solitaire vs Number Sums

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

Head to head
About

Calculation Solitaire

A unique solitaire game where the objective is to move all cards to the foundation piles, but with a twist: foundation piles are built by stepping up by a specific number, ignoring suits. A hint card guides players through the challenging gameplay.

Highlights
  • Unique foundation building by number steps
  • Hint card for planning
  • Stashing columns for cards
  • Adjustable difficulty levels
  • Bonus game mode
Features
Read full description

CALCULATION SOLITAIRE is a challenging game that will keep you thinking. Like normal solitaire the objective is to move all cards onto the foundation, but unlike normal solitaire you don't build the foundation in-order (suits are ignored). Rather you step by a number with wrap around (modulo 13 for the mathies in the crowd). The first pile is built stepping by 1s. A 2 3 4 5 6 7 8 8 T J Q K The second pile is built stepping by 2s. 2 4 6 8 T Q A 3 5 7 9 J K The third pile is built stepping by 3s. 3 6 9 Q 2 5 8 J A 4 7 T K The fourth pile is built stepping by 4s. 4 8 Q 3 7 J 2 6 T A 5 9 K Sounds confusing, but we provide a helpful hint card which shows the progression so you know what is coming next and can plan to win the game... which you will need to do because it is very challenging. There are board columns where you can stash cards that don't yet go on the foundations. However cards on the board cannot be moved, unless they are promoted to the foundation. Totally free!! No in-app purchases. You can play an easier or a harder version plus a bonus game One234 where all the cards are laid out in a fan.

About

Number Sums

This app offers a challenging number puzzle designed to enhance mental math skills. Players must make the sum of numbers in rows, columns, and colored regions match given clues by circling correct numbers and erasing extras. It provides a fun way to practice arithmetic and logic with various difficulty levels.

Highlights
  • Summing numbers in rows and columns
  • Matching sums to clues
  • Circling and erasing numbers
  • Multiple difficulty levels
  • Board sizes from 3x3 to 10x10
  • Hint system
Features
Read full description

Number Sums is a challenging number puzzle to train your mental math. The goal is to make the sum of numbers in each row, column, and colored region be equal to the clues on the side of the board and inside the colored regions. Practice your math skills and logic with Number Sums! Each row, column, and region has its own solution, but the goal of this math game with numbers is to make them all work at the same time. You have to circle the correct numbers and erase the numbers you don't need. Remember, the sums of the numbers in rows, columns and colored regions should be equal to the numbers on the sides of the board and inside each region. Each level of this numbers game has only one solution, try to find it to solve educational math puzzles! Mental arithmetic is an invaluable math skill for your everyday life. Inside Number Sums you'll find math puzzles of various difficulty. The mechanics of these math riddles sounds simple but requires a lot of thinking. Playing sum number games and solving math problems can improve your arithmetic skills. If you are interested in number puzzles or math games for adults, and in training your addition skills, play this engaging number game for hours of fun! How to play Number Sums: - Circle the correct numbers that add up to the values on the sides of the rows, columns and regions. - Use the toggle to switch between circling and erasing modes. It will help you to mark the correct numbers and the extra numbers that you don't need. - Each level of these math puzzles has only one possible solution, so make sure that the rows, columns and colored regions work together at the same time. - Train your math skills with this free number puzzle with various levels of difficulty. Open different types of board from 3x3 to 10x10. Tips to hone your skills: - Erase numbers on the board that are greater than the totals in the boxes. - If there is only one odd number in a column or row, and an even number is the sum in the box outside the board, then remove it. - If the largest number on the board isn't the same as the total outside the board, then add the smallest number from the board to it. If the sum is greater than the value in the box, then erase the largest number. What you get by playing the Number Sums game: - Tons of number puzzle games to challenge your brain. - Enjoy your game experience with the minimalistic and simple design. - Useful hints to help you when you’re stuck. - Mind puzzles with no time limits. Take your time to find the one and only solution to these number games. If you enjoy number games, take a break with Number Sums puzzles. Challenge your logic and play Number Sums anywhere, anytime!

Screenshots

Calculation Solitaire4 screens
Number Sums4 screens

Verdict

The call

The clearest difference is rating: Number Sums at 4.6 against Calculation Solitaire's 2.8. Number Sums also leads on update cadence (every 2 months vs every 12 months) and ratings volume (31K vs 4). Calculation Solitaire's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 15.0). On price, review sentiment, 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. Number Sums sells 1 one-off in-app purchase. Calculation Solitaire asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Number Sums holds the better App Store score, 4.6 against 2.8. That said, the two scores are not equally well evidenced: Number Sums has 31K ratings behind it against 4, so its average is the more settled of the two. Written reviews split almost evenly too, at 25% and 26% positive.

UpkeepUpdate frequency

Calculation Solitaire ships an update every 12 months, Number Sums every 2 months. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

Scorecard6 real differences · 4 level
Calculation Solitaire versus Number Sums: the parameters behind the verdict, then further details
ParameterCalculation SolitaireNumber Sums
PriceFreeFree
Rating2.8 (4 ratings)4.6 (31K ratings) — better
Positive reviews25.0% of reviews25.6% of reviews — better
Number of ratings431K — better
Update frequencyEvery 12 monthsEvery 2 months — better
AdsYesYes
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size18 MB227 MB
Age rating4+12+
DeveloperMmpApps Corp.Easybrain Ltd

Customer experience

Calculation Solitaire

All ratings4 ratings
Positive25.0%
Neutral25.0%
Negative50.0%
Written reviews4 reviews
Positive25.0%
Neutral25.0%
Negative50.0%

Number Sums

All ratings31,317 ratings
Positive90.8%
Neutral4.7%
Negative4.5%
Written reviews1,365 reviews
Positive25.6%
Neutral21.3%
Negative53.0%

Bugs and requests

Calculation Solitaire

Not enough reviews yet to summarise bugs or requests.

Number Sums

Reported bugs

2 issues
  • Incorrect number removal function removed
  • Ads randomly opening browser pages

Requested features

4 requests
  • Dark mode option
  • Separate buttons for circle/erase
  • Auto-erase incorrect numbers
  • Difficulty/grid size selection

In-app purchases

None

Calculation Solitaire

No in-app purchases

1 purchases

Number Sums

One-time1
  • Number Sums No Ads$14.99

Questions

Is Calculation Solitaire free?
Calculation Solitaire is free to download, with no in-app purchases.
Is Number Sums free?
Number Sums is free to download, with in-app purchases available.
Which has better reviews, Calculation Solitaire or Number Sums?
Number Sums is rated higher. Calculation Solitaire averages 2.8 out of 5 from 4 ratings, while Number Sums averages 4.6 from 31K ratings.
Do Calculation Solitaire or Number Sums have ads?
Both Calculation Solitaire and Number Sums show ads.
Which is updated more often, Calculation Solitaire or Number Sums?
Calculation Solitaire ships an update every 12 months, and Number Sums every 2 months. Most recently, Calculation Solitaire was updated on October 24, 2026 and Number Sums on October 27, 2026.

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