How Is a Streak Pet's Age Measured on TikTok: By Streak Days or Growth Points?

Hey! I just started a streak on TikTok and already have my pet. A friend told me that its age matches the number of streak days — like, if I’ve been on a 10-day streak, then the pet is 10 years old. Kind of like how dog years work compared to human years.

But I see it differently — I think the pet’s age should be based on the growth points it’s earned. What do you all think?

I know it’s a silly question, more for fun and roleplay than anything serious, but I was wondering: is there any kind of official or fan-made calendar for streak pet aging?