Ovulation Help

So I'm having a terrible time trying to track my ovulation. I'm using two apps and ovulation kit. They all differ. This app doesn't allow me to adjust my period like the other app does so I go by the other more, but that one doesn't offer the community support. I think the problem is my cycle is never the same. This past cycle was 34 days long and previous to that one my cycle was 28 days... Any suggestions???