SaaS Metrics Fundamentals MRR - Monthly Recurring Revenue
How much revenue your SaaS generate a month ARR - Annual Recurring Revenue
Customer Acquisition Cost - CAC
CAC =total $ spent on sales and marketing over a period / # of customer acquired within period Customer Lifetime Value (CLV or LTV)
LTV = Customer Revenue x Customer Lifetime Churn
Churn rate =(# of churned customers in a period / total # of customers to start period) x 100 Vital to know, you'll want to close the leaky bucket It becomes more relevant as your app grows Customer Tracking and Analytics Recording Tools
These let you watch each individual session Examples: Hotjar, Crazy Egg, Smartlook Analytics Tools
Overall analytics for tracking items such as churn North Star Metric
For example, Facebook's 7 friends Pick a metric that you think is reflective of your ideal new user Check their analytics each day in the first week 
Measurement and Analytics