The end of the app trip is not necessarily the end of the incident
A rental app may show the ride as completed before a person finishes parking or steps away. Keep the receipt, app messages and any photographs of the return position. The time shown can help with your claim. It does not tell you how a later fall happened or who was responsible.
For a personal device, write down the same sequence: where you slowed, stopped, dismounted and walked. Identify any vehicle movement or surface change. Whether you were riding, standing or walking can matter when reviewing what happened. Avoid compressing all of those steps into the single statement that you had a scooter accident.
