I'm currently building a brand for my own product and I've been struggling to get something concrete together that I feel happy with.
I've started to realise why I've been struggling, and that's because I've been exploring brand colours/logotypes/fonts and other UI content when I've been designing the UI assets for the app. Big mistake.
Lucid really helped me to get out of this bad spiral since it sort of guided me through the process creating a brand. And! The cool thing is that I already had a lot of the assets spread out in 14 different Sketch files. I really like it!