What are some alternatives?
When comparing E-Robot and Llama, 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.
MacroDroid - MacroDroid - Automation for your Android Device
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Workflow - Powerful automation made simple.
AutomateIt - Automate Your Android!