Glow fertility window wrong???

Jessica
Last cycle was the first time I used glow. Ttc and after my fertility window was done I decided to download other <a href="https://play.google.com/store/apps/details?id=com.glow.android">ovulation apps</a>(5) and it seems they were all aligned except glow ... Has anyone experienced this and has anyone gotten pregnant just using <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a>?