I was so appaled at the UX for signing up that I wrote a Medium post about it
https://android.jlelse.eu/an-onb...
I'll have to check out the new version and see if they fixed it somehow.
What's New:
The Musical.ly 6.0 update, published Wednesday in the iTunes App Store and Google Play, includes an overall refresh to the app’s look and feel along with two key enhancements: a new section that shows similar videos you may like to watch; and new options for user profile pages, including the ability to post a video instead of a photo
Looxie
Wireframe Components Kit
Makerpad
Wireframe Components Kit