I have all background apps shut off......"Restrict background apps" setting.My S5 is certainly up to par.Works fine with the Go app.Even my buddies S3 works perfectly with the Go app but he will not buy Litchi because how it failed for me.I should emphasize that the "Track" mode failed for me and that was the only reason I bought Litchi.I do not care about way points and the the other features.