What is the best smartwatch for Android?

I choose between Samsung Galaxy Watch and Garmin Vivoactive 4 in the Fitnessbit rating -

https://fitnessbit.ru/obzory-fitnes-gadzhetov/rejting-luchshih-smart-chasov-2018-goda-kakie -umnye-chasy-vybrat-top-10-luchshih-modelej / higher than Garmin, but in light of recent events (hack) I'm not sure about him. For me, design, reliability and functionality are most important. Of course, Garmin has adjusted the reliability, it is unlikely that this will happen again, but still.

In your case, many options are suitable for the scenario that you presented. Here's a short list of what might work for you.

1. Amazfit Bip ( see the price on Yandex.Market ) - one of the best smart watches for Android devices. Their huge pluses are their low price, long battery life and a transflective display that's perfect in direct sunlight. Cons: the same display that has poor color reproduction and low resolution. Also, for someone it will be a minus of their appearance - it is an amateur.
2. Amazfit GTS ( see the price on Yandex.Market ) is a logical continuation of the "Beep". They have a color amoled display, which is in no way inferior to the watch screen from the Apple. Aluminum body and a large list of functions, including music control.
3. Amazfit GTR ( see the price on Yandex.Market ) - by design they are more of a version of a classic watch , but combine the functionality of its brother GTS. As well as theirs, the battery life is good, up to two weeks.
4. Ticwatch C2 ( see the price on Yandex.Market ) - from the Mobvoi company will be an even more functional option than competitors from Amazfit. There is already a full-fledged android for smart watches, there is a speaker and a microphone. It is possible to install applications from the market. But the disadvantages include a short operating time in comparison with Amazfit, a maximum of 5 days.
5. Huawei Watch GT ( see the price on Yandex.Market ) - smart watches that are a direct competitor to Amazfit GTR. The functionality is almost the same, but a definite plus is the battery life up to 28 days.

These are just a few of the possible options. Also on my own I can suggest Xiaomi Mi Band 4.

For your scenario, this is the best option, since it is cheap relative to hours. The battery life is two weeks. The only thing is that there is no way to install third-party applications.

And read about what a smart watch is and why you can here.