Anyone use Glow and Ovia?

Lisa • Married. Girl Mama X 3 Stillborn Son; Silvanus - February 14, 2016. Molar Pregnancy; D&C September 5, 2020, another D&C November 23rd- Cesare 👼🏻 MTHFR +
Anyone use both of these apps together and all info is the same but they mark your fertile days different?
Ovia says my first fertile day was Monday, and Glow says my first is not until tomorrow (Thursday).