.25 ratio on iPhone?

I've just started using the DAFNE Mobile app on my iPhone 6 -- fantastic app! However, I've run into a problem: when I did my DAFNE course the nurse educator found that the correct QA:CP ratio for me was 0.75:1. With 0.5 my BGs were too high and with 1 they were too low. This is fine when working it out manually (with final calculation rounded to nearest 1.0, given I use a 1.0 unit pen) but I can't set this up in the app because it will only accept 0.5 increments. I understand that 0.5 increments is the lowest DAFNE 'officially' goes, but in my case, 0.75 is what I need to take to keep sugars stable. My 12/12 BI dose is right -- my sugars remain stable overnight between BB and BF reading.

I've found a workaround... although the app has a validation rule that fails, and instructs you to use 0.5 increments, if you just cancel the validation dialogue box, you can still switch to other areas of the app and the .75 ratio is applied. It's not ideal but it works...