When my account will be expired?

Hello,

Can I use this site for 20 days or 90 days?

Unless things are going to change, you can use this site for free as long as you like, with certain restrictions. The 90-day challenge refers to a personal challenge where you are invited to make your goals public and to work towards them for 90 days. If at the end of the 90 days you have achieved your goals then you are a personal winner! Good luck with your studies here :slight_smile: