Mobile app installs burning question

Hi guys,

I got a burning question. I am running apps like wifi master, du speed booster. Have scaled it across different traffic sources (4 in fact) and third tier geos to take advantage of the cheaper bids.

But I am only getting profits of low 2 figures daily. 🙁 I have split tested my lps and is running my best converting lp. Some days got profit while some days not. So it is rather fluctuating. I am not spending a lot daily as it is already negative ROI. How can I scale into 3 and 4 figur ...