Glow vs Fertility friend

Marisa
First month of tracking on both Glow and FF, getting 2 very different charts. same data used.... I am more thinking FF is accurate as my CM changed to creamy sticky on cd12...  however had a really positive opk on cd 12 any thoughts ladies? which app gives you most accurate data?

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Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

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