If you are new to Habitify Premium, you can get the Family Sharing subscription from the iOS app in the Upgrade tab. Then, follow this guide to purchase the subscription for your Family.
In case you are using personal plan of the renewal subscriptions, and would like to switch to Family plan, please follow this guide:
On your iOS device, go to Settings app
Tap on your name
Choose on Subscriptions
Find and tap on the Habitify subscription
Tap on View Plans
Find and choose the Family Plan
Follow the following instructions on the screen to complete your purchase.
If you are on Lifetime plan purchased before April 1, 2025, we do not support switching directly from personal plan to family plan by all means. It is because the Lifetime plan is like you pay to buy the whole product. In this case,you may consider buying another product of Habitify Premium for your family.