Indoor tracking (from accelerometer, NO GPS)

Hello,
I am even less than a newbie, not having even tried the program, so be forgiving!
I need to record (short) tracks that are mostly indoor, so no GPS signal may be available.
This is ideally possible if Orux tracks from the accelerometers too, as some hybryd GPS receivers do, using accelerometer data to improve or replace GPS tracking when it's not available.
But I haven't been able to understand if Orux does this.

Anybody knows? (or may suggest some tool to do it)
Thank you for your help!