Is EVE accurate

How accurate is <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">EVE</a> with predicting your fertile window? Is there any other app that you recommend. I also use pre mom. Pre mom and <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">EVE</a> has totally different predictions.