Currently, this cannot be done on the JustPark app.
However, you are able to change the price of your listing by signing into the JustPark website on a laptop or desktop.
Firstly, go onto your dashboard to find 'Parking Spaces'.
Once you have headed to Parking Spaces, select the listing on which you wish to change the price. You can change the prices for your parking space any time.
Click 'Edit' on the listing you want to change.
Scroll down to find the 'Pricing' section, where you'll be able to choose your daily, weekly and monthly price.
Finally, click Save and your new price should be updated.