Review of Digital Watch - Model K57

Rating: Poor

Price: $20-120 from ebay or Amazon (search "smart watch K57")

Size: 2.2" diag screen size - 71 grams (1-1/2 oz) - 320x386 screen - Aluminum Case - IP67

Gender: Mens

Health: Calories, Heart Beats, Blood Pressure, Body Temp, and Blood Gluclose, Female

Helper Apps: Weather, Cell Notification, Alarm, Timer, Stop Watch

Modes: 50 Sports Modes (walking, hiking, running, cycling, etc)

Steps: Pedometer (steps & miles per day)

Sleep: tracks light & deep sleep & length of sleep

Extras: Music, Find-a-Phone, Female, Camera, Calculator

Cell: Cell Phone App included (iPhone - Android) with Cell Phone/Text Notification Interface

Setting: Very Limited Settings of Parameters

Time: Time paired with Cell Phone - Time CANNOT can be set or adjusted manually on watch settings

Weight: Heavy (71 grams) and very thick

Privacy: Data Tracking by mfg or 3rd parties

Function: Registration required to make watch work - Some Emails are denied, which means you cannot use the watch.

Battery: last around 1-2 days of normal use

Summary:

Disclosure: We purchased this watch with our own money. We do not accept any gifts or money for a favorable review. We tested this watch for four months.

There are many digital watches to pick from. As of 2026, many consider this digital watch the worst watch you can buy. It packs a lot of features, but need to be run off your cell phone. This watch also comes with a cell phone app that collects and stores the data on the mfg/3rd party cloud. The mfg of this watch removes your data and sells it. You do have to register the watch with the mfg or third-party to use the watch. The battery on the watch generally last about 1-2 days.

Things we DIDN'T like:

Restrictions- To use this watch it is MANDATORY that you have to go to the mfg/3rd party web site and use their cloud, which is located in China. Your data is stored on their cloud. To make matters worse, the mfg restricts certain Email addresses. If your Email address is restricted, your watch is complete WORTHLESS! We found a way to get around it and was able to set the date and time, but the rest of the features of the watch could not be used. It is outrageous that the mfg feels that it is okay to sell your health data, and restrict the use of YOUR watch. And, if you travel over a time zone or encounter day-light-savings-time, you CANNOT change the time without reinstalling the cell phone app. We also found that the watch lost time every day. One user said that they wanted to take a sledge hammer to the watch. You want to think a million times before buying this watch.

Metric - Some of the measurements are in metric, like the temperature and mileage. And, there is NO way to change it through a parameter.

Battery - This watch uses up the battery at an alarming rate. If you only use it for time, you will need the charge the battery every day or two. And, accept that the watch will lose time every day.

Weight & Size - The watch weights twice as much as other watches. They do advertise it as an athletic watch, so we did expect it to be more rugged. One tester was over 6' tall and 200 pounds said that the watch was too big for his arm.

Things we DID like:

Dial Face - The dial face is nice looking and does provide some good information. Other then that we HATED this watch with a passion.

Watch Band - Everyone liked the watch band. The band was well designed. But, with all the other nightmares, most testers could not waited to rip if off their arm.

You would be crazy to buy this watch, but if you are crazy, it can be purchased on ebay or Amazon.

K57 Smart Watch
Alternate watch dial face

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