the apps are builded on framework7 v2.0.2. (just with jquery / without vue etc)
the most information/html are just getting pulled from a php based backend.
we played a little bit with locaStorage for staring the favorite clubs & players.
we inserted Chart.js for some nice charts in the player statistics.
PouchDb replicates pretty seamlessly with Apache CouchDB (no-sql web server) and you just deal with JavaScript and JSON, it is free under the apache license, but you are right at the end of the day you still need to find a place to install it$. http://couchdb.apache.org