V4.11 Certificates are back dates are wrong so booster certificate date is automatically wrong. Check in and out is unstable as you have to have a good connection ..why can't we check in offline and it syncs. Secondary check in a mall shop not working at all. Covid positive not recorded. Never got any update on traceing. Focus on functionality actually working not promoting commercial services. Good thing the government got this app for free as it is a poor RELEASE version and very poor fixes.