I am currently using glow and <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period tracker</a>. Glow said that today my period was supposed to come but my other app says in four days. This is my first month using Glow so I was wondering if people find glow or another <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period Tracker</a> to be more accurate