I’m using an app called Renpho: https://apps.apple.com/us/app/renpho/id1219889310

You can also get their weight scale and bluetooth measuring tape that syncs with the app. I used to use Fitbit and Aria weight scale, but switched over because Fitbit doesn’t have the measuring tape. Here is the Amazon link for both products. Can get them separately too! https://www.amazon.com/dp/B094Y8VHY7/ref=cm_sw_r_cp_api_i_RG200SKNEQM9Z6S9SFNB