They get an email and it waits in their app. Nothing is written into their day until they accept it and choose a profile.

Only what you see here is shared: today's tracked total, your biggest category, and how close you ran to your own plan. Your log stays yours.

Pick as many categories as you like, then who they're for — tap a group to take everyone in it. Apply starts them alongside whatever those profiles already have running. Apply and override stops their other timers first, so the whole group switches to the same thing at the same moment.