“there is a certain circle size three to four people that has significantly higher conversion and retention than lower and higher circle sizes... higher secret sizes is often friend groups or things like extended family or they probably less motivated to pay for safety features”

Design for the buying unit (3-4 person circle), not the individual user

Life360 found that 3-4 person circles convert and retain dramatically better than 1-2 (couples who outgrow the use case) or 5+ (friend groups with weaker pay motivation). If your product has a group dimension, find that band and design for it explicitly — onboarding, defaults, paywall framing. The unit isn't the signup; it's the household.