Need a Scheduling App for work

[HeresYourShovel]

I am a satellite technician for a retailer. We have 3 salesmen/women in our office and the owner who sells also. I am the only installer and I stay very busy. Currently, when a job is scheduled, the office people write it on a dry erase board that has a calender drawn on it. We had a no show on a Sunday because no one told me about a job, so the boss now has the office people to take a picture of the next days entry on the calender and text it to me. So, I'm thinking we need an app that each person can access, input, and edit jobs. Out of 5 people we have 2 androids, 2 iphones, and a blackberry. We will all have tablets eventually.
Does such an app currently exist? If not, where do I go to suggest such an app?
Any reply would be appreciated.

Chris

 

[Jrphotopro]

There is an app called When I Work on the Play store. They also have a website Employee Scheduling Software through Free Mobile Apps | When I Work
This might work for you.