We have new CARTO SDK version 4.1.0 release candidate:
https://github.com/CartoDB/mobile-sdk/releases/tag/release%2Fv4.1.0-rc.1 . It has many major updates, including
offline geocoding, reverse-geocoding and search, new multi-profile
offline routing, supporting also custom area downloads, new base map styles and many performance improvements and smaller new features asked by customers. Basemap style changes are breaking, so minimal code changes may be needed to update SDK; especially if you use customized vector tiled map styles or offline routing. Otherwise it should be very simple to update. Of course implementing new features is needs to be done in your app side.
Please test your apps and let us know if it works, and if it doesn't.