The problem Butter Vault solves

People can use it for daily transaction but being able to make transfers without any fees makes it more similar and interesting to a web2 user.
Social logins enabling users not to worry about the seed phrase, passwords, etc. We think everyone still prefers a simpler onboarding experience, so we got it covered.
The accounts are being stored in a secured registry and protects the details with regards to that.

Challenges we ran into

We were having issue with integrating a cross-chain experience for the users and we decided to choose one of the prominent chain out there - Polygon. Still cross-chain can be acheived at a later stage of iteration