I run the app on my fire phone. Everything is super good and very fast. When I run the app, I have. Within maximum 5 seconds GPS reception Thus, navigating can start right away. The accuracy of navigation is around 5-8 meters. Thus, quite useful when it comes to accuracy. But my highlight is the offline navigation. The cards can download and use directly. So far the app has not yet crashed with me or stopped. Overall, 5 stars for the app.