I use several services paid for via subscription model. Bobby makes it really easy to keep track of what services I use, how much I am paying and when they renew. While it's true you could use the iTunes Store app, emailed receipts or even the Reminders app to collect all this information, having a dedicated product to do all this for you just streamlines the process.
The app is also very well designed. You can use the available templates or create your own you may need for less popular services that may not turn up in a search. There is a light and dark theme available or let time of day decide that for you. You can also choose between 4 different app icons.
Are you subscribing to multiple services? Is this something that would be of benefit to you? Let us know your thoughts. And check the latest episode of the iOSDocked contest for more information on how you can win a new case for your iPhone 7/7 Plus/8/8 Plus or new iPhone X!