List every recurring charge and the annual total appears. Most people cancel something within the first ten minutes.
See true monthly and annual cost across all subscriptions, what renews next so free trials don't convert unnoticed, and cost per category. The annual figure is usually the one that changes behavior — $14 a month reads differently as $168 a year.
Ten minutes of setup, and the savings recur every month after.
Who it's for: Anyone who has been charged for a service they forgot they had, which is nearly everyone.