I'm using Graphhopper core library to compute distance and best path between 2 points, i read about Graphhopper Routing API and as explained here, API has a pricing scheme , so my question is what actually will the add-on that's provided by API that's not exist inside APP
that worth paying ?
Not sure if this belongs to SO, but here you have a rough guidance.
Advantages of the GraphHopper Routing API:
- hosted and fault tolerant service with support
- highly optimized configuration
- frequent software updates (runs cutting edge & tested versions)
- frequent data updates (usually daily, guaranteed weekly)
- no need to buy servers with >50GB RAM that are usually required to run a world wide setup
- integrates easily with jsprit via
optimize=true or the Route Optimization API
- with truck profiles out of the box
- improved heuristics to calculate ETAs with OSM data (we work on making this open source hopefully soon)
- optionally instead OSM data with TomTom data and time dependent historic traffic data
- other APIs like the Matrix API, see the comparison table here and reasoning about closed vs. open source here
Advantages of the open source project (Java knowledge required):
- highly customizable to e.g. tune country or use case specific rules. (this is now also available for the GraphHopper Routing API via a dedicated setup)
- write any vehicle profile
- active community
- import of any data source (can read osm xml, pbf, shp, custom) for the road network or for elevation data
- runs offline e.g. on Android or iOS
- currently public transit routing is only available in the open source project
- find nearest point API (can be simulated with a routing request where start=end)
- can do indoor navigation in theory, in practice have a look here