Absolutely. Just head over to pro.joistapp.com from the web browser on your computer and sign in with your Joist account's email and password.
Everything you do there will stay up to date on your Joist app automatically, and vice versa.
Many contractors will use Joist from their phone when out in the field, then switch to their computer when at home or in the office.
You don't need to download an app to use Joist on a computer. Just head over to pro.joistapp.com to get started today.