Navionics clone?
Good on them for their efforts.
As I said in another NAV thread, where do they all get the data from, the same source of course, do they update promptly from that source will set them apart for those with local knowledge.
I have a 2014 vehicle with a built in Nav, it did not have a new hwy I often use so I sent off $200 US for the updated data in 2016, only to have my money returned when it did not show the HWY built in 2012. I asked sales rep can they look at latest version and tell me when it shows up, nope.
Whereas Google maps showed the hwy sections as they opened and completely when finished. Much more impressive to use that app.
As pointed out above, a new marina should be in an app update, as well as navigational channel depths which can be in constant change.
Navionics is changing, dropping info it had, has it returned the currents in Deception pass?