This is simple app supporting weighing scale using OKO protocol. There is Android app for this, but not Windows app.

This app has some uniq features:

1. setting tare (if you know that your scale need such correction)
2. it calculates body fat from bioelectric impedance (if scale supports this), or from BMI.
3. it can share last measurement between instances of this app on your different Windows devices
4. it can export history of measurements in format that is easily imported to e.g. Excel to make any graphs you want
5. it can be configured to not save anything anywhere
6. it doesn’t use Internet, so it doesn’t require you to create account etc. on remote servers
7. it is not adware

See screenshots, it can be some sort of user guide.