I use this app to keep track of my cycle & I would give it a 5 star but the it refuses to open. I uninstalled it & reinstalled 2× it but it won't open. It also refuses to add an emblem on my home scree. To even get to the app itself, I have to go back to the app store & search for it. When I do find it, the app still refuses to open... if this is no longer running those of us that have used this for a while should be informed so we can find an alternative fertility app.