I bought this as a replacement for my Amazon Halo since Amazon announced it was no longer supporting Halo after June. I will list the pros and cons first with a review below so if you are looking for bottom-line analysis you don't have to read my entire review.

Pros.
1. App has limited features but what it does do it does well and doesn't require a subscription.
2. Slim profile great for women or men that want a tracker but not looking for a giant smartwatch like a Garmin or Samsung.
3. Incredibly inexpensive for the functionality you get.
4. Blood pressure and pulse oximeter function which are features even higher priced trackers do not support yet and the readings are fairly accurate when I compare them to readings at my last Doctor's appointment.
5. Uses standard watch straps so no more ordering expensive proprietary watch straps. You can get a replacement strap at a department store for cheap.

Cons.
1. App doesn't give fitness tips or suggestions, recipes track BMI or other features that subscription-based trackers provide. This may be a pro or con for some. I hated these features and am happy not to pay for a subscription since I did not use these features anyway, just give me the data and I will do my own analysis! But if you like these features, you won't find them here.
2. Grammar, some of the analytics compare to averages in your weight and age class i.e. "beyond 26% people get up early" Does that mean 26% of people in my demographic wake up earlier than me or am I waking up 26% earlier than the average? Unclear
3. the app is intuitive and easy to learn but if you are not familiar with its features there are not a lot of ways to figure it out without trying to contact Da Fit directly. If you've used a fitness app before I think you can figure it out, but if you are new to these devices you might struggle getting aquatinted.
4. The way it calculates calories burned seems to be more optimistic than I have had with other trackers including sony move, google fit, noom, Halo, and Fitbit. I would say it overcompensates by about 10% on average. Not a big deal if you're aware of it.
5. Doesn't track total calories burned in the day so if you are using BMR as a metric in your training this can be a problem, however, you can sync the Da Fit app with Google Fit if you have Android and Google Fit will do this for you.
6. The GPS trail feature only works for running and not Cycling.

I prefer a wristwatch for telling time. My job requires me to track time constantly and Smartwatch screens that have to be awaked constantly or using my phone is inconvenient. The Halo was a fitness tracker without a screen and was slim. This tracker is identical in size to Halo so I wear a wristwatch on one wrist and this tracker on the opposite side and it does not look weird like a Norman Schwarzkopf double watch fashion statement. It just looks like a black silicone bracelet since I leave the screen off all the time and just access the tracker via my phone when needed. That being said it will allow you to receive text messages from your phone but not let you reply or answer calls.

This tracker is a great value for experienced users of fitness trackers. The app gives you the basic functions you need without the fluff or expense of a subscription. While I feel it is intuitive to use, if you're not familiar with these types of devices there are no manuals or online help available and I have not seen many good tutorials on YouTube either. They go provide contact information for support but have not called so not sure how good the support is. If you're a first-timer or not particularly tech-savvy, you may be better served spending a little more on a more well-known and better-supported device.

Another point worth noting is that Da Fit is a third-party app being used to support many low-priced trackers on Amazon and other outlets. The benefit of this is if your inexpensive tracker breaks(these are used in physical activity and life happens right?) It is easy to pick up a replacement tracker and sync it to the app even if the tracker is a different brand than the original. Just verify it used DaFit before purchasing. I once broke a $300 Fitbit and decided to replace it with an alternative and all of my data was useless on my new device. Of course, the reverse is true and DaFit could stop supporting the app but since it's not a subscription the tracker should continue to function as normal there just won't be updates. This is unlike my experience with Amazon Halo where they just emailed me and said the device will stop working in July and won't be charged my monthly subscription fee anymore. One day everything is fine next day poof... No more Halo.

I think if you are looking for a bare-bones yet intuitive tracker that just gives you the data you need without bells and whistles you don't need this is a great option that costs well under $100 on the average tracker with similar functions. The Da Fit app is surprisingly good for that price and when I pair it with Google Fit, all of my needs are met. I imagine the same is true for iPhone users. This unit is advertised as being iPhone compatible, although I have not tried it myself.

In the process of setting up. Will return with updated feedback after using for a while.
I got the watch set up & it was quite easy. I'm enjoying using it as I get accustom to wearing a watch after not doing so for years. I truly appreciate the sleep app as this was very revealing. Not sure how accurate the blood pleasure app is. I have compared it to the arm cuff and most times there is a significant difference between the two. It seems the wrist reading is extremely sensitive to the wrist position. Overall, I like the watch & would buy it again. Update - don't buy if main reason is to check blood pressure. The readings are not reliable. I have a cuff monitor that I've used to check the watch Only once out of dozens of readings have they been close.

Addendum - I still rate the watch a 4 while still discounting the accuracy of blood pleasure, but the band is the pits. The band has holes for the metal piece to be inserted into as well as 2 crossover loops to insert the extra part of the band into. The band does not stay in the 2nd loop which laves it flopping around. Hopefully, the manufacture will improve the band

The fit watch and app are great. No monthly subscription fee for fit tracker app. Downside I am allergic to faceplate backing so I have raised bumps on my skin. So I must take breaks while wearing the watch for my skin to heal which is a drawback. Overall still love the watch and fit app.

I like the look, the weight. I actually like the simple options more than the overload of options on other more expensive watches. Customer service was nice and activated my lifetime warranty and let me pick out 2 free watch bands. I'm still not sure of the accuracy of some measurements but it's close enough for me to be helpful so I don't mind. The drink water reminder and the step tracker are my main needs. Other reviews said it died completely but I haven't reached the one month mark quite yet so I'll update if need be for that.

My one complaint would probably be that it seems to disconnect itself from my phone a bit even tho it's on Bluetooth it says but the weather will be blank and no messages come through anymore. Which isn't a big negative for me but would be nice if everything stayed working smooth on a device like this.

Customer service is amazing! I was in water for less than an hour and my watch stopped working. They quickly sent me out a replacement. I then fell in a river with a new one and it broke off I couldn't find it had to go back the next day first thing in the morning it was under water all night. I managed to get the first one working a couple weeks later and am completely happy with this purchase! Thank you for this experience seller.