The Wyze Smart Scale X Butterfly enters a crowded market of bathroom scales that promise more than just weight. It aims to deliver detailed body composition data—like body fat, muscle mass, and BMI—without the premium price tag often associated with such features. After spending a few weeks using it in a typical home setting, I have a clear picture of where it excels and where it falls short.
This scale connects via Bluetooth to the Wyze app, which is free to download and use. Setup is straightforward: you place the scale on a hard, flat surface (not carpet, as that can throw off readings), install the app, and pair the device. The scale itself is a sleek, white unit with a tempered glass top and a bright LED display. It can handle up to 400 pounds and uses four AAA batteries, which are included. The design is minimal and unobtrusive, fitting well in most bathrooms.
- Body composition tracking: It measures weight, BMI, body fat percentage, muscle mass, and a handful of other metrics like bone mass and visceral fat. The scale uses bioelectrical impedance analysis (BIA), sending a tiny, imperceptible electrical current through your body to estimate these values.
- Bluetooth and app sync: Data transfers to the Wyze app automatically when you step on the scale with your phone nearby. The app stores historical data and shows trends over time.
- Multi-user support: The scale can recognize up to eight users by weight and automatically assigns readings to the correct profile in the app. It works well for households where people have distinct weights.
In real-world use, the scale is reliable for weight tracking. It consistently matches readings from a standard mechanical scale within a few tenths of a pound. The Bluetooth connection is stable, though you need to have the app open or running in the background for the sync to happen. If you forget your phone, the scale stores the last reading, but it won’t sync retroactively unless you open the app again.
The body composition data, however, requires tempered expectations. Like most consumer BIA scales, the accuracy of metrics like body fat percentage and muscle mass can vary significantly based on factors like hydration, time of day, and recent meals. I compared its readings to a professional-grade body composition analyzer used at a gym, and the differences were noticeable—sometimes as much as 3-5% for body fat. This makes the Wyze scale more useful for tracking trends over weeks or months rather than relying on individual numbers. It is a decent tool for noticing whether your body fat is trending down or up, but not for precise measurements.
A key limitation is the reliance on Bluetooth rather than Wi-Fi. This means the scale only syncs when your phone is within range. If you weigh yourself and then leave your phone in another room, the data might not transfer until you open the app again. Some competing scales in a similar price range offer Wi-Fi connectivity, which is more convenient for automatic syncing without needing the phone nearby.
Comparing it to other smart scales, the Wyze Smart Scale X Butterfly sits between basic weight-only scales and more expensive models like the Withings Body+ or the Fitbit Aria Air. The Withings scale, for instance, offers Wi-Fi syncing and a more polished app experience, but it costs roughly twice as much. The Wyze scale gives you the core features—body composition tracking, app integration, and multi-user support—at a lower price point. The trade-off is in convenience and the granularity of data accuracy.
Who is this scale for? It is suitable for anyone who wants to track weight and basic body composition trends without spending a lot of money. It works well for individuals who are comfortable with Bluetooth and are okay with opening the app to sync data. It is also a good fit for households where multiple people want to track their own metrics separately.
Who might want to look elsewhere? If you need precise body fat measurements for medical or athletic performance reasons, this scale will likely disappoint. Similarly, if you want a scale that automatically uploads data to the cloud without requiring your phone to be nearby, a Wi-Fi-enabled model would be a better choice. People who prefer a simpler, no-app experience might also find the Bluetooth requirement more of a hassle than a benefit.
Overall, the Wyze Smart Scale X Butterfly is a functional entry-level smart scale that delivers on its basic promises. It is not a medical device, and it does not claim to be. For everyday weight tracking and a general sense of body composition trends, it gets the job done at a reasonable price. Just go in knowing the limitations of BIA technology and the Bluetooth-only connectivity.