What are some alternatives?
When comparing E-Robot and Workflow, you can also consider the following products
Tasker - Tasker is an application for Android which performs Tasks (sets of Actions) based on Contexts...
Automate - Automate various tasks on your Android smartphone or tablet.
KiSSFLOW - KiSSFLOW is a workflow tool & business process workflow management software to automate your workflow process. Rated #1 cloud workflow software in Google Apps Marketplace.
MacroDroid - MacroDroid - Automation for your Android Device
Automagic Premium - Automagic Premium is the magic wand to automate your Android device.
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.