Factor Gems for parents and teachers
A playful number puzzle first, with a mechanic that gives players repeated reasons to notice factors, divisibility and changing number relationships.
What players do
The gems carry numbers rather than colours alone. Players swap neighbouring gems to line up four or more numbers with a shared prime factor. The game divides those numbers, clears gems that reach 1, and lets falling pieces create new chains.
That makes the game a low-pressure way to spend time with number relationships. Players can begin by following a satisfying chain, then gradually start looking for factors that are not visually identical. Optional gem-layer rings show each gem's factors, giving players another way to read the board.
Structure and pace
The 50-level adventure gives clear goals and a limited number of moves per level. After the adventure, Endless Challenge offers a more open-ended score chase. The first five levels are guided lessons.
Crafting and curiosity
In the Gem Workshop, players multiply two gems to make a new one or split a gem back into its factors, which puts multiplication and factorisation in their hands. Each collected gem unlocks a one-line story about its number from the real world — history, science, geography, culture — as a small reward for curiosity rather than a quiz.
Data, ads and purchases
The game works offline. It is free to download, and a single one-time purchase unlocks the full game: no ads, no subscriptions, no account and no data collection. Progress stays on the device. Sharing a card only happens when the player chooses to, through the device's own share sheet. Details are in our Privacy policy.
What we do and do not claim
Factor Gems invites players to notice common factors and builds familiarity with divisibility through repeated play. It is not a lesson, a worksheet replacement or a guarantee of improved attainment, and it is not curriculum-aligned or endorsed by any school, university or education authority. The two-person team comes from higher-education and secondary-education backgrounds; that shaped the wish to make number relationships visual and active.