Time is money, and people are always trying to use their time as efficiently as possible. By all means, when you promote your product let people know how much time they would save if they had your product, giving them extra time for themselves. These examples speak for themselves:

“Save 500 hours every year with our management software.”“Free up your weekends to spend time with the people you LOVE.”
“Save 2 hours a day by switching to our product.”
Take a look at this guide to master your ad copy on time-saving.