I received my smartband yesterday using a Nexus 5. The lifelog app is a battery draining monster and lack several functionalities (running, bikin, sharing activities, etc). Furthermore the band is still not working with Google Fit . I assume that in order to work with it and other apps (endomondo,etc) the API should be available. But it was promised to be available two months ago and we still dont have it. I mean rather you work on a better app (investing more resources) or you make available the API for others make this smartband useful (which would take at least other half a year more) to those of us who bought it . There not excuses for not releasing the API and keep us suffering with this lifelog app while you are not working on it anymore.