boAt Ultima Prime Smartwatch with a vivid AMOLED display and strong fitness tracking

Calls can be made and answered from the watch. The microphone and speaker are built in, and the call controls are right on the screen. The phone needs to stay nearby for Bluetooth calling to work.

Around four to five days is possible without constant phone connection. Bluetooth calls and lots of notifications can bring that down to three or four days. The ten-day claim is more suited to lighter use.

Battery life can vary quite a bit. Some units may last several days, while others can run down in less than a day. Bluetooth connection and calling seem to make the drain faster.

The screen looks sharp indoors and the colours are good. The always-on display helps when you just want to check the time. Outside in direct sunlight, the display doesn't look as bright.

The watch weighs about 45 grams. That's not too much for wearing it through the day or at night. The silicone strap is fine for sleep tracking, though the round dial can feel big on a smaller wrist.

IP68 covers sweat, dust and normal splashes. Wearing it during workouts or in light rain shouldn't be a problem. Deep-water use isn't recommended.

Both have AMOLED displays, health tracking and Bluetooth calling. Ultima Prime has more than 100 sports modes and a 300 mAh battery. The app experience is different between the two, which may matter if you check workout data often.

Both cover Bluetooth calls and basic health tracking. Ultima Prime has a round dial and more than 100 sports modes. Phoenix Ultra has its own calling and fitness features, so the differences are more about the design and feature list.

Amazfit Bip 5 has built-in GPS for outdoor workouts and route tracking. Ultima Prime has an AMOLED display, Bluetooth calling and a larger list of sports modes. Anyone who needs route tracking will need to keep the GPS difference in mind.

Heart rate and SpO2 are available for basic checks. The watch also records sleep, steps, calories and active minutes in the Crest app. These readings are meant for fitness tracking, not medical use.

Yes, there are more than 100 sports modes listed. Running, cycling, swimming, yoga and other activities are included. Most people will probably stick to a few modes they use regularly.

No built-in GPS is included. It can still count steps and track workout activity, but it won't save an outdoor route by itself. Location tracking needs the phone.

The app shows health readings and workout details after syncing. It isn't always quick, and some graphs can take a while to appear. The data is easier to follow once everything has loaded.

Some owners have reported the watch turning off even when there is still battery left. Restarting it usually gets it working again. Unexpected shutdowns can be annoying during normal use.

The black coating can start to look lighter after months of use. The edges and exposed parts usually show the change first. The watch itself keeps working, but the finish may not look new for long.

There is no proper silent option for alerts. Notifications can still come through while the watch is on your wrist. This can get irritating in meetings or other quiet places.