OneSec is a free Android game developed by Smaex. It is a fast-paced casual game that challenges players to find and click on the highest number displayed on the buttons within one second. The game rewards players with points for clicking on the correct button as fast as possible.

OneSec offers a leaderboard for players to compete with others and earn coins to unlock new color schemes. The game is easy to play and offers a fun way to pass the time. With its simple design and addictive gameplay, OneSec is an excellent choice for anyone looking for a quick and fun game to play on their mobile device.