If you mean BRouter offline (re)routing: “offline route calculations use the fastest route (no curvy routing available, limited support for avoidances)” .
Until Kurviger offline routing is implemented and as mentioned in offline routing guide,
After testing various settings as a quick solution for a simple set of different routing profiles used for offline routing with BRouter in the Kurviger app, I would recommend to save up to three new profiles, according to one’s personal preferences.
As template for every profile I used “car-fast.brf” (copied to every of the three bfr-files for Kurviger) and only modified the sections mentioned subsequently.