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Sum Fun

Sum Fun

Sharpening minds since 2015

33 ratings
18 reviews
With Ads
🎮 Games
📚 Education
🎲 Board
🧩 Puzzle
Free
With Ads

Details

  • Released
  • Updated
  • March 13, 2014
  • July 7, 2026

Features

Developer

Greg Sharpe
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Sum Fun screenshot #1 for iPhone
Sum Fun screenshot #2 for iPhone
Sum Fun screenshot #3 for iPhone
Sum Fun screenshot #4 for iPhone
Sum Fun screenshot #5 for iPhone
iphone
ipad
⭐18
Reviews↘︎
🔄6+ apps
Alternatives↘︎
🎪2 happening
Events↘︎
🏆3 achievements
Achievements↘︎
❓8 answered
FAQ↘︎
📦~ in 6 days
Updates frequency↘︎
🖼️Get Icon
Icons↘︎

About

A unique number puzzle game that combines logic, numbers, and strategy. Enjoy endlessly replayable puzzles with creative board shapes and a brain-boosting gameplay experience. Play at your own pace with no time limits and challenge friends.

✓Unique number puzzle gameplay
✓Variety of creative board shapes
✓Brain-boosting mental workout
✓No time limits for relaxed play
✓Challenge friends offline
✓Easy to play, fun to master
Show original description

What's New in Sum Fun

2.9.2

July 7, 2026

We're welcoming Summer with new events for Sum seasonal Fun: • Explore our Postcard Challenge and collect unique artwork from around the world, inspired by our travels! • Play brand new shapes alongside popular favourites in our limited-time Summertime Collection, including Strawberry, Tulip, Butterfly and more! Plus, we've been busy building Sum more Fun: • Choose from different sound effects collections to add sum extra spice to your game! • Replay any of your 3 most recent games – beat your own score or challenge friends! • Customise the appearance to help the board and tiles stand out more, including larger numbers for enhanced visibility • Browse and share your completed postcards in Achievements

More

Events

Read more about Sum Fun Summertime Collection
AvailableNew Season

Sum Fun Summertime Collection

Play our new Summertime shapes

Jul 8, 2026 — Jul 31, 2026

Read More

Read more about Hallstatt Impressions
HappeningSpecial Event

Hallstatt Impressions

Collect stunning artwork of Hallstatt, Austria

Jul 15, 2026 — Jul 31, 2026

Read More

Read more about Castles of Germany
Event EndedSpecial Event

Castles of Germany

Collect stunning artwork of German castles

Jun 15, 2026 — Jun 30, 2026

Read More

See All

User reviews

Most RecentHighest RatedLowest Rated

Very fun!

Enjoyable game
 Goofygoober Goofygoober

Great game

I find myself pushing to improve in every game. At 74 I think I can still improve.
.,mnbv.,mnbv

THIS GAME HAS MASSIVE _____

this game has massive appeal and is very fun to play. great fun. warm, and very heavy, this game has made me realize how fun life can be. It has helped my math skills greatly. It has the balls to call what is truly true, truth, and sleuth the truth from the booth.
person336.22person336.22

Love this game!

I hope to see the next one soon. I get immersed and lose track of time. Thanks a bunch, Donnalou.
Minnielou70Minnielou70

Maths Muse

Maths solving is relaxing for some of us and this is spot on for me.
jfunke3rdjfunke3rd
See 13 more reviews

Developer apps

Zero?
Zero?

The Zoom and Zen number game!

🎮 Games

(4)

Free
See developer apps

FAQ

What is Sum Fun?

Sum Fun is a number puzzle game that combines logic, numbers, and strategy. It offers a unique twist on number-based puzzles with various creative board shapes and brain-boosting gameplay.

How do you play Sum Fun?

The core gameplay involves placing numbers into empty slots. If a number matches the last digit of the sum of its neighbors, they are cleared. If not, players strategically place numbers to set up future sums until the board is empty.

Can I play Sum Fun offline?

Yes, Sum Fun can be played offline. You can challenge friends by sharing games via QR code, text code, or simply passing the device for local multiplayer.

Does Sum Fun have ads?

Sum Fun contains advertisements. It features banner ads and optional rewarded ads for extra content, but no intrusive pop-up ads that interrupt gameplay.

What devices is Sum Fun available on?

Sum Fun is available on iPhone, iPad, and iPod. It is designed for iOS devices.

What is the age rating for Sum Fun?

Sum Fun has an age rating of 4+, making it suitable for a wide range of players.

How often is Sum Fun updated?

The latest version of Sum Fun is 2.6, and it was last updated on March 25, 2026. This indicates a history of updates, though the exact frequency is not specified.

What makes Sum Fun different from Sudoku or Kakuro?

Sum Fun offers a unique gameplay mechanic where placing a number can clear adjacent numbers based on a sum rule, unlike the fixed grid and elimination rules of Sudoku or Kakuro.