Need help?
For questions, bug reports, or feedback, visit our support page:
When reporting a problem, include your iPhone model, iOS version, app
version, and the steps that led to the problem.
Common questions
How do I start a challenge?
Choose an operation and difficulty, then tap Start challenge.
How long is each round?
Each round lasts four minutes. Enter an answer and tap Check to submit it.
Do I need an account?
No. No account, login, or user credentials are required.
Where are my scores stored?
Your results and score history are saved locally on your device. They are
not sent to us or shared with third parties.
Does the app need external services?
No external services or platforms are needed for the app to run.
What happens if I delete the app?
Deleting the app removes locally stored results.