How much is the strides app?

I'm curious to know, what is the current pricing for the strides app? Is it a one-time fee, or do they have subscription options? Are there any discounts available for first-time users or those who refer friends? And lastly, does the price vary depending on the features or services offered within the app? I'm looking to invest in a fitness tracking tool and the strides app seems like a great option, but I want to make sure I'm getting the best value for my money.