Pregnancy Tracker Failed And Hack Issues In The App

I recently uninstalled and then re-installed this app dahil pag-open ko kanina bumalik sa 7 weeks yung sa pregnancy tracker ko when it's supposed to be 21 weeks na and I don't know how it happened, before din I've had issues with it's security kasi pag access ko everything is changed from contents to language which was set in Thai ? and even my profile pic is someone I don't know... Sobrang unsecured sa feeling nun and now this one... Mayroon po bang ibang naka-experience na nito? And once pala I uninstall mo sya everything resets... Your account is not saved at all... So back to zero din yung points ko and all.. Nakaka-frustrate lang bat ang daming issues ng app nato.. Sana gawin nilang mas secure... Face palm talaga sakin ehh pero no choice ako...