What is the Sia Blend game, how does it work?

According to the introduction of SPARTED, Sia Blend is a Educational game on the Android platform. There is currently a 3.7.0 version released on Sep 03, 2019, you can see the details below.

This App is your day to day tool to keep top of mind what you learn during your last training session
Every day, improve your knowledge and you'll soon become an expert. Win points and badges to reach the top of the leaderboard.
With this app, play 3 minutes a day and learn any where, any time on your smartphone.

> MANY QUESTIONS AND THEMES
Answer new questions everyday in numerous categories!

> SHARE YOUR ADVENTURE
Invite colleagues and friends to join and compete with you

> IMPROVE YOUR RANK
Compare your results with friends and more