"new" to TTC charting

Jillian
I would love for some guidance and possibly a few people to keep in touch with!
My husband and I have been ttc for over a year. My sister-in-law suggested charting my cycle / fertile windows using an app. The issue I've run into is that I have 3 apps I follow and all 3 give me different fertile windows. I am fumbling my way through tracking my temp each morning to try and find my ovulation day naturally.
So I guess my question is, has anyone ttc actually conceived by following an app?