More flexibility with reminders

I should be able to change what reminders are being sent for each client individually. For example, if certain clients I know are on their phones more, they should be able to get multiple texts from one week out to three days out to one day out to even a few hours out. While other clients are more on top of their emails, I should be able to have it set for them when and how often they get emails, up to three or four reminders, sort of like you can do in Google Calendar