You reserve a space before you drive: pick where and when, see the full price for that exact window, pay in the app, and the space is held for you. When you arrive, your booking is how you get in.
Movedi doesn't own car parks. The spaces belong to the people who run them — car parks, hotels, office buildings, residential garages, airports — many of which aren't otherwise open to the public. Each operator decides what to offer, when, and at what price.
Because each location sets its own rates and rules, they differ from one car park to the next. What doesn't differ is that you see them before you commit: the total for your window, and the terms that apply to it, on the screen where you confirm.
You can extend a booking from the app if you need longer. Stay past the time you booked and you're charged for the extra time rather than penalised. Cancellation terms are set by the location and shown to you before you pay.