Restarted iphone and lost everything

Katy
I restarted my phone and now everything I had logged into flow is gone. After I close the app it makes me sign in again- and repeat the whole swiping introduction. Glow us asking me to invite my partner, which I already did. Oddly, it remembers my weight.... But not how far along I am. 
I loved the app, but this is enough to make me leave it behind.