Campaign Optimisation

[joeko]

Hello, I launched today campaign on propellerads, I spent $ 11.03 and got 6 conversions. ROI = -56.56% (image 1)

I use 2 creatives in campaign with same description and different headlines.

All conversions came from different zones (image 2)

1.Should I add more creatives?

2.Should I create separate campaign just for OS version when I got 3 conversions and conversion rate is 11 % (image 3)