Your smart scale will send its data directly to a dedicated app, for which you'll need to create an account. When you open this app, you'll be able to see all your measurements. But it might also be possible to link your smart-scale app with another fitness app or platform. This is where it gets tricky. A high-quality app will work with Apple Health and Google Fit. There's also a very good chance that you'll be able to share data with Samsung Health and MyFitnessPal. In our experience, the Fitbit app is more difficult. In some cases, apps and platforms work seamlessly together. In other cases, it's a more involved process. If you have a particular fitness tracker you use or a fitness platform you're heavily invested in, you should determine which smart scales are compatible with it before you start shopping.