For now, LearnObit is free-to-use.
However, this is a commercial project and I have to make a living with it (otherwise I'll starve).
I will likely do this through a subscription model, because I don't have any other options (maybe another option is sticking ads into the product, but that sucks). What I'm thinking of is that free for basic features, $2/m or $18/y for special features. So, be aware that the product could change to a charged product one day. but nothing is set in stone just yet. If anyone has any good ideas, feel free to send me your comments and suggestions. For now, enjoy this incredible tool, totally free.