When is the InMode treatment most effective?

I am planning to get an InMode treatment ahead of an important day. When should I get the treatment to look my best on the big day? I am thinking of getting the treatment on my chin area because of my double chin.

I heard that the effects of InMode don't appear immediately, but rather start to show after a certain period of time. Also, you get bruises after InMode treatments, right? I'm wondering when the bruises will completely disappear and when the InMode effects will be at their strongest. I plan to calculate the optimal time for the treatment to see if it works best.

Also, will a single treatment not be effective for a double chin? How many sessions would be needed to see improvement in a double chin with InMode?