Weight problem

#pleasehelp First to ask a question here. Mga Mommy ok lang kaya weight ni baby 6.7 kilo lang sya she is 9months na I search on google normal naman but base sa app nasa 8kilo na dapat si baby now.6.3 sya nung 6months .4lang nadagdag sa weight nya she's eating well naman po 6months pa lang nag sosolid food na sya and breastfeed sya.