Future Android App's handling of OSM data

Question about the anticipated Android app for CycleTravel:  is the plan for the app to be able to function in Offline mode (locations without cellphone reception or with intermittent reception)?   
If the answer is yes, then will the app be able to utilise an OSM mapping database that already exists on the cellphone without creating its own version of the OSM database?
I ask because the OSM database can be quite sizeable if it covers multiple countries, and it may already be on the phone by way of manual download or via another pre-installed app (for example, OSMand).

I would understand if there is no current answer because it is too early in the development of the CycleTravel app.

Thanks
Martin