I'm pretty happy with the DFP running Locus as my nav device. I spend a lot of time without a cell signal which obviously isn't a problem *except* when I want to search for a gas station, restaurant, etc. Is there a POI database that can be downloaded to Locus or Google maps, and that's updated regularly? I'd want it restricted geographically, say Vermont/New Hampshire.
I've used an app called POIBase that let me sync up new POIs with Sygic and a few other apps, but I could never find anything for Locus
Openandromaps now provide a POI database for each map/region for use in Locus (the .db file that appears in the zip when you download them manually). Locus implements that in the "LoPoints" feature. Bear in mind I have not put a lot of time into it, so I don't know how thorough those databases are.
I’ve used a few offline map apps that use OSM offline maps that automatically include all the POIs build into OSM for the area downloaded. I currently use Guru Maps Pro and while offline I can search for POIs by type, such as gas, restaurants, lodging, etc and will both show me them on the map and list format with an option to navigate to any I select. I can also search for POIs by name, such as Texaco. In any case I can also select a searched POI and create a always in map icon for it if I plan to reuse it.
Puregas had kml downloads https://www.pure-gas.org/about Restaurants are so volatile I gave up on using pois for them.
This is precisely why I leave the CoPilot and TomTom Go apps on my phone - for POI search and "navigate to". Otherwise, I am also a Guru Maps Pro user. I don't have a data plan on my phone, otherwise I'd pretty much just depend on Google to find/route me to the POI (when in cell range).
OSM data (which is what openandromaps and LoMaps pull from) relies on user submissions for accurate data. Become a contributor and help improve the maps.
The OSM POIs may not include the exact place I want, but there is usually something similar. If I head towards an alternative location, there is a very good chance that I will be back in a cell service area long before I get there so I can fine tune the destination. Gas stations, restaurants, etc. are seldom located in areas without cell service. You might also check out https://www.newenglandriders.org/gps-points-of-interest/ and http://www.poi-factory.com/search/node/fuel+vermont