Navionics app.

[Downriggerer]

I have a question about navionics,  when you get the app and pay the subscription for the year, if you drop it the next year do you loose the data you have gathered.?

I have the app on my phone, which is not the same as the chip in the sonar.

The data you accumulate is stored on your phone (unless you upload it publicly).  So you don't necessarily lose the data.  But if you don't have the subscription, you lose the ability to use that data with the Navionics service, which is the same result as losing your data.  

So functionally, yes, you lose your data if you don't maintain the subscription.  You'll also lose it if you change phones.  I bet you can guess how I know that.