Owlet questions

So I have the owlet monitor for my 4 month old and we hadn’t used in like a month and when she was sleep tonight her heart rate was around 100-118 is that normal? It normally stayed around 120-130 the last time we used it when she was born and 2 1/2 months old. Idk if I’m just worrying but what but she seems completely fine no issues she waking her normal amount of times