I have like 4 pregnancy apps and they all say the baby is a different size . One says an apple,…

I have like 4 pregnancy apps and they all say the baby is a different size . One says an apple, another says a pear , and another says a navel orange... I don't know which one to go by aha cause the one that says a pear says baby will be the size of a navel orange in 2 weeks and another says it's that size now .. Confusing but almost 16 weeks :) im 15+4 today OB appointment on Tuesday and gender scan on Friday :) hopefully they can tell if it's a 💙 or 💗 :))