David Hill asked about 2 years ago
It is hard to pick one 😅 I learned a lot with UI Jar and still learning!
First thing that comes to my mind right now is that I wish I added user signup feature from the very first day. I released it way too simple as I did not have any expectations at all. When it became product of the day at Producthunt with 1k+ upvotes on top of all the social media shares, the site got thousands of visits in a short period of time and I missed a big chance to get people signed up and keep them engaged.
So, next time I release something, I will make sure to add sign up feature even if there will be no features for it at the beginning :)