DelvfireSirius Fitness Tracker with Heart Rate Monitor, All-Day Activity, Step Counter, Sleep Monitor, 1.3" Touch Screen, Waterproof, Pedometer, Fitness Watch compatible with iPhone Android (Teal)

I tried several watches with all common apps and this one is the best! It runs with Veryfit which gives you lots of data. The functions are not perfect, but it's no medical device, so don't expect 100% accuracy - great though to give you an approximate overview of your active health.The watch fits all wrists, isn't bulky and has a nice design.The watch/app could improve by adding 02-levels, blood pressure and definitely more watch faces.Lots of watches allow to make/receive calls directly, but that makes them much bigger and uncomfortable.This watch doesn't offer calls but a call reminder.I won't use it in water anymore, as two died after I did. A big splash/handwashing/rain/fog...doesn't affect it though.

What I really like is the charge lasts for ages,very easy to use.

Good comfy strap does what it says

Met all my expectations

I bought this watch for my son but I have to return it as it is not connecting fully to his phone.he cannot fet any messages or notifications

Bought as a present, no complaints so far

Relatively easy to set up, although previously used 'Very Fit Pro' app, and had problem linking this watch until I found a warning that I needed the 'Very Fit' app instead? So installed that and it seems fine. Early days as only hada for 2 days. Battery looked to be used up faster than expected, until I discovered setting to stop watch displaying time every time I moved my arm - but only when requested. Doh! However, display is lovely and clear and the heart rate, and steps monitoring seem pretty accurate - will know more in a week or two. But overall very happy.

Likes: The App has many nice features, good priceDislikes: The watch is very inaccurate, to the point of being unusable in many situations. I was not expecting this to be very accurate but this was too far out. I calculated that many measurements were out by 30%. So just a simple task like seeing if you were doing 10,000 steps a day could mean you only did 7,000. I could probably estimate this more accurately without using the watch.Although the battery life was good, many of the functions stop working when the battery goes down to 15% meaning the usefulness of the battery life is much shorter.Some of the sports screens were very hard to read while actually carry out the activity.