Here's what I'm looking for, I'll keep it simple and to the point. Details - The app would just track/notify personel. -We currently run an on call system on our days off that can earn extra cash by call. -From a pool of defined individuals, 2 of them are on call at any given time. -We all take turns taking the predefined on call schedule, but sometimes we can give away our "spot". -If one or both steps out for any reason (life/busy/out of area), the pool would be notified and another can step up in his/her place so the "service call" isnt missed. -And if the 2 individuals specified to be on call stepped out, and wish to return to "back in service" the others who temporarily stepped up would be notifed and moved back down (per say). -A push notification would be great, as everyone is aware of any changes at all times. Example - Syncing everyone to - "Mygrocerylist" app works in a very unorthodox way but doesnt use any push notifications which would be nice. Also texting each other until you find a replacement gets old too. Any suggestions on any app that can help manage this would be greatly appreciated. Many thanks for any input!