Schultetable.com - Rewire your brain & Mental training!

I'm a person who always loves mathematics. You see once i graduated i barely do anything related to maths, Back in the days i used to think fast and was in good mental condition. I researched and learnt about schultetables. They have the same benefits as solving 3 difficult mathematics problem! But there wasn't a website that had some required features such as leaderboards, progress tracking, etc. So for that reason i built schultetable.com - Progress tracking - logins - Leaderboards all in one app to boost your brian! Please let me know any feedback you have! it matters the most to me!