Bobby - Keep track of your subscriptions
Sensor Tower - Sensor Tower is a platform for app store optimization and app industry intelligence.
Rocket Money - Find your paid subscriptions and cancel with one click
App Annie - App Annie is a marketing analytics tool available for apps of all kinds. With App Annie, you can track sales, traffic, and a variety of other factors pertinent to monitoring an app's trajectory.
Billbot - Track your subscriptions & recurring expenses with ease
appfigures - Cross-platform app store analytics for all of your mobile apps.