TL;DRA Fitbit Air user has built an open-source, free app that provides features reserved for the $10/month Google Health Premium subscription.Coincidentally, another developer is building a similar product with the same name.Google Health Premium is currently available at no cost to subscribers of the Google AI Pro and AI Ultra plans.Google launched the Fitbit Air around a month ago, and it’s among the top screenless fitness wearables you can get right now, alongside Whoop. Users can sign up for an optional $10/month Google Health Premium subscription to gain additional health insights on the Fitbit Air. But what if you want some of these bells and whistles for free?Italy-based developer Flavio Adamo has built an open-source desktop app called OpenFit that does pretty much everything the Google Health Premium subscription does, but at no cost. For the uninitiated, Google’s monthly subscription provides deep analysis of your health data, with tools like Health Coach and other features.