4.9/5
( 191+ reviews)
Features 15 Giây
A mini game to help you improve your mental math skills
Secure & Private
Your data is protected with industry-leading security protocols.
24/7 Support
Our dedicated support team is always ready to help you.
Personalization
Customize the app to match your preferences and workflow.
Screenshots
See the 15 Giây in Action
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Download on Google Play
Available for Android 8.0 and above