From a practical perspective that may be true. Consumer GPS (eg. Phone/Tablet) is typically augmented GPS, whereas certified aviation GPS uses WAAS (Wide Area

From a practical perspective that may be true. Consumer GPS (eg. Phone/Tablet) is typically augmented GPS, whereas certified aviation GPS uses WAAS (Wide Area Augmentation System) to improve accuracy. The key difference is that aviation GPS will warn the pilot if there is degraded performance below requirements, whereas consumer GPS doesn't.