Here it is, a complete program for navigation in iPhone, or as it is also classified as Turn-by-Turn. That is, constant tracking of coordinates and checking the route with tips. In this assembly, all roads in Russia. I haven't checked everything, but in Moscow, one-way interchanges and roads are being worked out correctly.
interesting 6.1-inch iPhone 12 and iPhone 12 Pro will go on sale first Now officially: the announcement of iPhone 12 will take place in a week
In operating mode, the battery runs out after 3 hours, so the machine must be powered up.
Those who have used Novik's products in other navigation devices, in particular those of the Garmin type, will find a similar interface logic. In principle, searching by addresses and objects is reduced to determining the end point of the path. After that, the route is laid. There is a useful function “Demo mode” here – when the movement along the laid route is emitted. It turns on when there is no signal from satellites. Thanks to this, you can use the map on 2G phones where there is no GPS module.
Firmware 3.0 required for proper operation
Install from AppStore
Other helpful articles:
The best navigators for iphone 
Radar detectors for iphone – test the best apps 
DashCommand OBD-2 Car Diagnostics c iPhone