An ex-trucker turned IRS Agent asked if the app is using GPS, what is to prevent a driver from carrying his phone while on vacation, activating the app, and then trying to claim Per Diem for his personal travel?

Technology alone cannot compel honest behavior.  Per Diem Plus knows when a driver is home, for it auto-deactivates when the device is within the tax halo. However, the app was designed to account for vacations, off days and unforeseen delays like breakdowns, waiting for permits and weather that prevent a user from meeting the logic requirements written into the app.  If Per Diem Plus detects a user is away from home, but has not met the logic requirements, it posts an onscreen notification (daily) whereby a driver can decline the notification (vacation, off day) or acknowledge (substantiate) they qualify for per diem. The app posts “Not on Trip” and records the date and GPS location after a driver declines the notification.