Period tracker apps

How many different apps do you have? Are they all synced together? Do they all read the same? Mine are not. So my obvulation days are a week apart! 😂 it sucks! And my average cycle went from 28 days to 35 days. It's annoying. Anyone recommend a better app than Glow? I'm TTC but my <a href="">glow app</a> isn't as accurate as it should be.