Restore Premium
If you have already purchased Premium, use Restore Purchases inside SUM while signed in to the Apple Account used for the original purchase.
Restoring a purchase does not charge you again.
A Puzzle Meadow game
A quiet game of mathematical noticing.
Small puzzles about order, balance, patterns and relationships. SUM is less about calculating quickly and more about noticing what is already there.
No timers. No streaks. No leaderboard. Just the small moment when everything falls into place.
Available now on iPhone and iPad.
Created by Zenworks Studio.
Download on the App StoreMeet SUM
Mathematics has a charming habit of hiding everywhere — in order, balance, rhythm, shapes and unexpected connections.
SUM turns those small observations into puzzles. Some ask you to arrange things. Others ask you to balance, group, compare or recognize a pattern.
There is no pressure to solve them quickly. Move things around, look again, leave a puzzle for a while if you like.
The interesting part is the moment when the relationship suddenly becomes visible.
How it works
Each puzzle gives you a small mathematical situation without a long explanation. Start by noticing what seems to belong together.
Arrange, group or place the pieces. SUM is designed to be explored by touch rather than solved through menus and instructions.
When the relationship becomes clear, the puzzle tends to feel obvious in retrospect. That little change in perspective is the point.
Inside SUM
Three quiet glimpses from the app.
Begin with small ideas such as order, balance, difference, sequences and patterns. The first two sets — 32 puzzles in total — are free to explore.
Try, move, compare and rearrange the pieces until the relationship becomes visible.
Discover mathematical cards along the way, like the Golden Spiral — small ideas worth keeping and sharing.
Something to keep
As you explore SUM, you can discover a small collection of mathematical cards.
Each card takes an intriguing idea — a shape, pattern, theorem or mathematical curiosity — and turns it into something worth keeping and sharing.
They are not scores or achievements. Think of them as little postcards from mathematics.
Made to feel different
No banners, rewarded videos or interruptions.
There is nothing to maintain and nobody to beat.
The puzzles favour observation and experimentation over speed.
Close the game halfway through a puzzle. It will still be there when you return.
SUM supports English, Dutch, German and Vietnamese.
The first two sets — 32 puzzles in total — can be played for free. Premium is a one-time in-app purchase that unlocks the remaining puzzle collection.
Before you play
SUM Support
Most SUM questions should be quick to solve. If the notes below do not help, send us a message and we will take a look.
[email protected]If you have already purchased Premium, use Restore Purchases inside SUM while signed in to the Apple Account used for the original purchase.
Restoring a purchase does not charge you again.
SUM Premium is a one-time in-app purchase. Purchases are processed by Apple.
For billing, payment-method or refund questions, use Apple's App Store support. For questions about SUM itself, contact Puzzle Meadow / Zenworks Studio.
The puzzles remain playable without an internet connection once SUM is installed. App Store purchases and purchase restoration may still require a connection to Apple.
SUM is designed to be private and uncomplicated.
App Store purchases are handled by Apple. Any optional analytics on the Puzzle Meadow website are separate from the SUM app.
When contacting support, it helps to include:
SUM is available now on the App Store for iPhone and iPad.