Best Smart Watch

Compatibility: Most importantly, make sure the smartwatch is compatible with your existing smartphone. If you have an iPhone, you may need the Apple Watch, which allows you to use some of the same apps you use on your phone. On the Android side, keep in mind that if you're using one of Samsung's phones, some smartwatches (like Samsung's Galaxy Watch4) give you more functionality.

BP doctor watch can compatible with both modes,Android and IOS.So which ever systems your phone are,BP doctor watch can realize compatibility.(If your phone is running on something other than those two systems, forget it )

Comfort: Your smartwatch should be comfortable to wear, and when it comes to getting an accurate heart rate reading, it does have an impact on comfort, and even a strap that's too tight can throw off the watch's sensors.

BP doctor Watch the back shell built-in optical heart rate sensor, fit closely wrist when worn.

Battery Life: Can vary from 1 day to 10 days, it depends not only on the battery of the watch, but also how you use the watch. Certain applications (such as GPS is one example) are particularly power-hungry.

Water resistance: Most smartwatches are at least somewhat water resistant, but only some models can handle a dip in a pool or a deeper dive. Please check whether the specifications are up to ip67 waterproof and dustproof.
Charging: Some smartwatches come with a handy wireless charger. While some come with a snap-on dock for charging, or some require a usb cable that plugs into the watch itself.
Smartwatch technology is still evolving, so it makes sense to decide which features are important to you before you commit or overspend. For example, if you want to save money, you might consider a watch that lacks some complications like EKG detection. If you really need a device that just monitors your workouts, a fitness tracker might be enough.

But there BP doctor watch have all of these function,you can use the money of one watch get "two" production.

If you have an Android phone, a watch running Google Wear OS will work smoothly with your Android phone and Google Digital Assistant. Apple enthusiasts may prefer to use the company's own smartwatch, but some models from other brands also work with iPhones.