Any good ejuice calculator for ios app

[livinlarge]

Just wondering if there's an iPhone app for ejuice calculator that people recommend.
I see a few on the apple App Store but looking for input on which one to get.
Any info would be appreciated thank you

 

[graffinfected]

ejuice is good. so is ivape

 

[livinlarge]

ejuice is good. so is ivape

Thanks, I think I'm going to try ejuice app from the app store.