When should I test?

<a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> says my period is due in 2 days. However I usually start to feel symptoms of it coming. And I have none. But another app said it’s due in 5 days. Should I test on the 22 if it doesn’t show or wait until the 27? I’m thinking of even giving it until the 29th to be sure.