What are some alternatives?
When comparing Workflow and ifttt, you can also consider the following products
Automate - Automate various tasks on your Android smartphone or tablet.
Zapier - Connect the apps you use everyday to automate your work and be more productive. 1000+ apps and easy integrations - get started in minutes.
Tasker - Tasker is an application for Android which performs Tasks (sets of Actions) based on Contexts...
Integromat - Tool for workflow automation
MacroDroid - MacroDroid - Automation for your Android Device
Microsoft Flow - Similar to IFTTT and Zapier you can create automated tasks based on APIs from various services.