Look into an assumed name, or a DBA. It costs around $100 and takes an hour. (You will need to see the County Clerk at 60 Centre Street). It doesn't give you m

Look into an assumed name, or a DBA. It costs around $100 and takes an hour. (You will need to see the County Clerk at 60 Centre Street). It doesn't give you much in a way of legalities but it does enable you to open a business banking account, which you can do jointly with your partner. Coupled with a one-pager contract, the business account will establish a business entity separate from your persons and will allow you to keep track of profits and expenses. You can always convert it to an LLC or a Corp later on, should your app get traction. Good luck.