Preetam, lead dev here: Correct! Maru started on Lollipop actually and moved to Marshmallow with the 0.3 release. It can be a PITA to port upwards to a new Android version if there are significant changes in the internal system APIs (these are open to rapid change between major versions of Android, unlike the stable app-facing framework APIs). Anyways, hoping to move to Nougat before too long...