Buy the Amazfit Bip 6.

It is the only one of the three that is actually a proven, trustworthy watch and not a gamble.

What was compared

KIPTUMTEK Smart Watch for Women Men, Fitness and Sleep Trackers with 1.83" HD Touchscreen,... — $18.99
Smart Watch Fitness Tracker with 24/7 Heart Rate, Blood Oxygen Blood Pressure Monitor Slee... — $116.99
Amazfit Bip 6 Smart Watch, 1.97" AMOLED Display, GPS, iOS/Android | 46mm, 14-Day Battery, ... — $79.00

1. Track a run without your phone
The Bip 6 has real built-in GPS, tracking pace and distance without your phone. The KIPTUMTEK has no GPS chip, so runs and rides only log if your phone comes too. Unless you never exercise without your phone, that is a real gap for anyone actually training.
2. A screen that actually looks good outdoors
Reviewers single out the Bip 6's AMOLED panel for deep blacks and sunlight readability, something the KIPTUMTEK's basic HD touchscreen cannot match. You check this thing fifty times a day, so the difference is constant, not occasional.
3. Thousands of real owners back this one up
The Bip 6 carries nearly 7,000 reviews and independent tech press coverage confirming it holds up over months. The KIPTUMTEK has barely 200 reviews, and shoppers openly wonder online if the glowing ones are even genuine.
4. Fewer trips to the charger
The Bip 6 lasts about two weeks per charge in real use, while the KIPTUMTEK claims 10 days with no independent testing backing that number. Unless you enjoy charging your watch weekly, that buffer is one less thing to remember.
5. Yes it costs four times more. Worth it.
The KIPTUMTEK is 18.99 dollars against the Bip 6's 79 dollars, and if you just want a step counter that gap is real. But once you want a watch that tracks a workout properly and survives daily wear, that price buys a device that works, not a cheap gamble with 200 reviews behind it.