It may not be the smartest or the prettiest smartwatch out there, but it'll smoke the competition when it comes to price and battery life.

The Amazfit Bip S isn't the best smartwatch I've ever tested -- not even close. But it's definitely the longest running one. I wore it for almost 10 days straight without having to charge it once, and that's a lot more than I can say for its pricier competitors. But if battery life alone isn't enough to get your attention, the Bip S' $69 price tag should seal the deal.  

The Bip S is the third variant of the   Amazfit Bip   (along with the Amazfit Bip Lite). Created by Chinese company Huami in 2018, the original Bip was a fan favorite from the get-go. It did the basic smartwatch tasks for much less than competitors, and it lasted up to 45 days on a single charge.   CNET editor Scott Stein   gave it high praise as one of the best low-key smartwatches around.  

The Bip S has better   fitness   features and a slightly better screen than its predecessor, but it hasn't changed much in the last two years. And while it's still one of the best deals out there, it lags a bit behind others, like the   Apple Watch   or   Galaxy Watch , when it comes to features and connectivity.  

A design that matches the price

Save for a few new color options (pink and green) and a brighter display, the Bip S looks like a carbon copy of the original Bip. And by that, I mean it looks like a plastic Apple Watch, with a much thicker bezel and lighter frame.  

It's definitely not the most attractive smartwatch I've laid my eyes on, but it's practical and more comfortable to wear than some of the more premium, heavier watches that are bulkier. It's so light that I even forgot I had it on when I slept.

But the biggest price compromise comes at the expense of the screen. It's always on, which is a nice perk, but it's not quite as sharp, bright or responsive as a phone screen. The backlight also didn't always turn on when I needed it to. Sometimes it works on demand, but I had to exaggerate raising my wrist more often than I'd like to get it to turn on. And as mentioned before, it's not as sensitive to touch. I had to swipe or tap the screen a few times to get it to respond. When it does light up or brighten though, it's clear to see in broad daylight.  

The Bip S includes a few more watch faces than its predecessors, as well as the ability to customize some of the existing ones.

The Bip S' improved fitness tracking

The original Amazfit Bip covered the basics when it came to fitness tracking, but the Bip S takes it a step further by adding more workouts and better metrics.  

It can now log up to 10 different activities including yoga, weights and swimming. Its 5ATM water resistance makes it safe for both pool and open-water swims, and its built-in GPS means you can leave your phone on dry land while you're in the water or out on a run.

Since testing the Amazfit Bip S, I've been able to track my stats accurately. But I have to remember to do it properly. For example, the dial button can be programmed as a shortcut to start workouts, which is convenient. But for running (or other outdoor workouts) I still have to press the screen to confirm GPS connection before actually registering the run. This defeats the purpose of having the shortcut in the first place. The first few times I took it out, I forgot to confirm and it didn't log my run. Because it doesn't have automatic workout detection, you have to start it manually to actually log your workouts -- yet it will pause automatically when it senses that you've stopped moving for a while.

Like its predecessor, the Bip S has continuous heart-rate monitoring. During exercises, it broke down my information into zones on the mobile app to show whether I was in a light, intensive, aerobic, anaerobic or Vo2 max (maximum oxygen consumption) heart-rate zone. This is similar to what other sports watches like   Fitbit   and   Garmin   do, but because the Bip S' results didn't always reflect the intensity at which I perceived my workout, I'm skeptical of its accuracy.  

The Bip S translates heart rate into health metrics  

In addition to the usual steps and distance, the Bip S adds a new metric called PAI (Personal Activity Intelligence)., which grades you on how much activity you've done during the day This means that rather than relying on step count or calories burned, the Bip S uses heart rate data (along with basic demographic information) to determine whether or not the user was able to raise their heart rate long enough throughout the day to maintain a healthy lifestyle. When this is achieved, the risk of developing chronic illnesses like heart disease, hypertension and diabetes lowers, according to Huami.

The idea itself is not novel and it's similar to the move ring on the Apple Watch and zone minutes on Fitbit devices -- all of which are activity metrics that go beyond step counting. But it's new to the Bip family, and it was a good way to keep myself honest about how much activity I was doing (or not doing) during the day. Having it actually motivated me to keep going throughout the week.  

Blip S lacks certain smart features and has unreliable connectivity

Blip S' long battery life makes sleep tracking a breeze

The Blip S is a cheap option, but it won't replace your phone