As a driver, you decide your rate. Based on this rate, Lymo calculates a fare estimate (price range) for the ride. The maximum range is a guaranteed price that the rider will pay. Note that we include in the upper level of the range a buffer that allows unplanned traffic or roadworks that may not have been anticipated in the initial fare estimate so that it minimises any bad surprises for you.
In the case where you have defined your “own rate”, you have the possibility of setting the price range width yourself. Think about including some buffer for the upper value to be prepared in case of an unexpected even lengthening the ride.