Some vehicles can be reserved in the Hely app. This is possible from two weeks in advance, but you can also choose to start your reservation now.
The minimum booking time is one hour, the same as with non-reservable vehicles. After that, you reserve per 5 minutes. Between two following reservations there usually will be a non-reservable window of 30 minutes.
When you make a reservation, you also enter your end-time. During your ride, you can extend this with 30 minutes each, under the condition that the vehicle isn't already reserved then. Do you want to adjust your start time or shorten your end time? Then this is possible till 48 hours in advance (Hely GO & Hely FLEX) or till 4 hours in advance (Hely FLOW). It is not possible to change your reservation after that time, but in exceptional situations Hely customer support could help you with that.
Start or cancel your reservation in the Hely app under Rides > Reservations
Watch the instruction video on how to reserve a vehicle in the Hely app: