Are you interested in measuring more than your weight? Some scales have the ability to measure body fat and other body-composition metrics, which can be a more accurate prediction of overall health than a simple weight measurement. However, if just measuring your weight is your primary goal, a simple bathroom scale will be enough.
How accurate are body-fat scales? Home body-fat scales make their measurements using bioelectrical impedance analysis (BIA), which is less accurate than professional techniques, such as hydrostatic weighing (water displacement method), but the latter techniques are not practical for most home users. However, if you're careful to take body-fat measurements under consistent conditions, body-fat scales can provide a relative gauge of any gains or losses of body fat.
What about aesthetics? Modern bathroom scales take great pains to avoid being an eyesore. Chrome accents, glass platforms and/or colors to match any décor are common. Keep in mind that while portable scales that you can hide away are available, many digital scales work best when kept in the same spot for all measurements, which can make size a concern.
Are you a high-tech junkie, or do you want to access your stats on the go? Users who are looking to improve overall health, and love having access to their personal data via their smartphones or on the web, will appreciate the functionality of high-tech smart scales. These scales can upload data to mobile and web apps, and make it easy to track your weight, general fitness and more.
Read the instructions. Unlike mechanical scales, digital scales, even basic ones, are electronic devices that need to be used a certain way for the most accurate and consistent results. Bloggers Rick Jamison and Kathy Schmidt Jamison at RickandKathy.com look into the sometimes stark disparity between user reviews and expert reviews of scales and conclude that in many cases, they are the result misunderstandings and improper use.
The past few years have seen the emergence and growth of connectable smart scales. These scales connect via Wi-Fi or Bluetooth to mobile and web-based applications to let users track and share fitness data -- the latter being optional, of course. The increase in competition has led to more and more functionality, though not necessarily easier use. Our Best Reviewed smart scale monitors air quality (CO2) and can relay today's weather to your scale so you can figure out what to wear while you are weighing yourself. Watching what the next feature added to these high-tech scales will be should prove interesting.