communication apps to help house flippers

[Account Closed]

We are currently finishing up our first flip. The only area of weakness that we have experienced is communication. There are four of us working on the project and often two people will buy the hinges we need, or the trim paint...or no one buys it because we thought someone else was.

Does anyone know of a good app that would allow us to communicate with each other, regarding current progress, things that still need to be completed or items needed to complete a task?

We all come and go at different times...so leaving notes at the site is a waste of time if you have to run back out and buy grout that you could have picked up on your way to the site.

Thanks in advance for any assistance.