You can copy details from an existing entry to a new entry by following these steps from the entry list page:
  1. Tap the "copy" button below the entry you wish to copy.

  2. Then the add entry page will load with the origin, destination, vehicle, odometer distance, driver, mileage type, client, purpose and notes pre-filled. You can then make any edits which will only affect the new entry. After updating the details, tap the "save" button on the application toolbar to commit your changes or tap the back button on your device to lose any changes.