Since 2010, we’ve been navigating with two Garmin chart plotters & Navionics on the IPad. At one time we we also had Garmin on the IPad too & after using both alternately for a couple years grew to prefer Navionics. Last year we replaced one of the Garmin Chart plotters with a Raymarine Axiom & chose the Navionics. I really like having Navionics on both. I set the depth color on both the same & for me it makes it much easier to use the IPad for looking about at different screen views, tide & currents, while using the axiom for auto pilot control, AIS, & main navigation. The old Garmin is now just a back up.
With the Raymarine Axiom, whether you chose Lighthouse or Navionics it’s a subscription that cost $100 to renew annually. You can get by with out renewal, but lose auto routing, some chart detail & updates. On the IPad, Navionics is actually better than on the Chart plotter & only cost $22 for the annual subscription.
Jay