What is the difference between a plain digital scale and a diagnostic scale?

A plain digital scale shows one number: your weight. A diagnostic scale, such as the Beurer BG-51 or BF-105, additionally estimates body fat, muscle mass, water percentage, and bone mass using a small electrical current passed through your feet. Both are accurate for weight. The diagnostic models simply give you more information beyond that single number.

Can I use a diagnostic scale if I have a pacemaker?

No. Diagnostic scales work by passing a small electrical current through the body, and this should be avoided by anyone with a pacemaker or another implanted electronic medical device. A plain weight scale has no such restriction and is the safer option.

How accurate are body fat readings on a bathroom scale?

They are useful for tracking change over time and less reliable as a precise, one off number. Hydration affects the electrical resistance the scale measures, so a reading taken after exercise or a salty meal will differ from one taken in the morning. Weigh under the same conditions each time and watch the direction of the trend rather than the exact percentage.

Why does my weight change during the day?

Mostly water and food, not fat. Eating, drinking, and salt intake can shift your weight by one to two kilograms within a single day, which is completely normal. This is why weighing at the same time each morning, before eating or drinking, gives the most comparable readings.

Do I need a Bluetooth scale?

Not strictly, but it removes the friction of writing numbers down, which is usually the reason people stop tracking weight consistently. A Bluetooth model like the Beurer BF-105 logs every reading automatically, making the weekly trend easy to see without any extra effort on your part.