Android vs ios help!

Kim
Hi ladies,
​I have a mobile who rubs with android and an ipad. I used the ipad from the beginning and have now installed the app on my mobile. But they give different data! Like when i mark on ipad i have a migraine, on my mobile it is logged like stomach pain. And vice versa. Also my fertile window is shifted  on my mobile! Glow, could u please fix that? And which device is more accurate?? Thanks for answering me!