Crystal Math - Numbers On Spee

Contains adsIn-app purchases
60 reviews
Content rating
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About this game

Crystal Math brings brain training to a whole new level. No matter if against the clock, or against other math cracks, improve your mental arithmetic on a daily basis, unlock all achievements one by one and become the new math champion.

Test you math skills in four challenging modes.

Daily Challenge: Solve a new challenge every day and fight for a spot on the highscore list in three difficulties. Step up your game though, you only get one try!

Duel: Challenge other players to a duel, or accept someone's challenge and fight for the winnig time.

Time Attack: Practice under competition conditions. You have 30 seconds to solve the challenge.

Free Game: Explore the game free of pressure and find your personal techniques for upcoming challenges.

Choose an avatar and show math cracks around the globe what you are capable of.
What are you waiting for? Pick up your slide rule and get started!


Internet: To access highscores, challenges and submit your times.

Read accounts: to personalize you in-app purchases, so they can be restored after re-installation and across multiple devices.

Write external storage: To save a screenshot of duels in order to share them with your friends.
Updated on
Jan 28, 2019

Data safety

Developers can show information here about how their app collects and uses your data. Learn more about data safety
No information available
60 reviews
A Google user
August 13, 2019
I love any programs that challenges the mind (excise for the mind) expecially math problems (Mental Math etc..) On top of it, it's free!!! My goodness you can't beat that(pun intended). Avid chess player here so again anyone that wants to give their mind a good work out this is the program for you.
5 people found this review helpful
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Rusty Nuts
November 17, 2020
👍🏼A fun but educational way to train your brain.
6 people found this review helpful
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A Google user
February 2, 2020
Wow moves Fast! Lotta Fun!
6 people found this review helpful
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What's new

- Fix connection problems

- Revanche now possible once per lost duel

- Small user experience improvements/fixes

2.0.0 / 2.0.1
- Community (challenge your friends)
- Notifications
- Small improvements in UI and stability
- Fix data not loading on Samsung devices