You can remove the Jobulator app in the same way that you would uninstall any Apple app.
The removal of the app does not automatically cancel your Jobulator account, and it does not cancel your recurring payment profile.
How to Uninstall Jobulator on an iPhone/iPad
Tap and hold the Jobulator App icon on your home screen. An "X" will appear in the upper left-hand corner of the app icon. Tap the X to uninstall the app.
Then, click Delete once more to confirm.