[Other SmartWatches] kravmama1:
My personal experiences with smartwatches:

Bluetooth phone companion

: Moto 360, my cost $150

Looks nice. Runs android wear, works with any andriod phone (I think 4.4 and higher). With 5.1.1 update can tether to phone via wifi. Receive notifications, answer calls, but lacks speaker, so need to continue conversation on the phone. Remotely control music play on phone. Remote control of phone camera. Voice control (OK Google) to send text hands-free, or start call and search web hands-free. Available apps growing. Battery life 1 day. Can change watch face easily, lots of choices in playstore. Cannot be used independent of phone.

I returned this. Too limited for my needs.

Hybrid bluetooth companion/standalone phone

: Aplus GV18, my cost $25

large, square-ish face. light-weight silicon strap. proprietary software. Can pair with phone via bluetooth to receive push notifications. Connection has been stable for me up to 10m without obstruction (android, not iOS, phone). Has speaker and mic, so can answer and carry on full conversation on watch (sound quality on both ends is good). remotely control phone music (but plays from watch speaker) or load music onto SD card (user provided, format FAT32, upto 32GB) to play music independently. remote control phone camera or use built-in 2Mp camera for photo and video (low quality). Can also play loaded videos (AVI VXR MP3 format). Also accepts SIM card for voice calls and texts, to use as standalone phone. When used as standalone, can pair with bluetooth headset. Water resistant. No wifi, no GPS. Pedometer not that accurate. has calendar and alarm but OS is proprietary, so will not sync with Google. Will not sync contacts. Battaery easily lasts 2 days with light to moderate use. Limited watch face - choice of 3. I love it!. I have a pay-as-you-go SIM card in it. When I go for a jog, I leave my phone at home and forward calls and texts to the watch. (too much hassle to transfer the SIM card from phone to watch). I pair with bluetooth headset and listen to my downloaded songs. It is my go-to smartwatch.

Stand alone watch phone

: ZGPAX S82, my cost $125

large, square-ish face, rubber strap. 2G/3G calls and data, wifi, bluetooth, GPS (worked intially, now doesn't work on mine anymore). Full android 4.4. Basically, a full android smartphone in a watch size. Small size can limit apps, as apps not created for screen this small, cannot see everything on the screen. Limited watch faces. Full android OS uses alot of power. if you tightly regulate antenna use (i.e. turn off wifi, data and bluetooth when not in use) and reduce screen brightness, battery can last 1 day (i.e. 8-10 hours). Has Google Playstore. Sign into your account, and download you apps and receive your notifications that way. Or can use SWapp Link app if want bluetooth pairing with your phone, but will use lots of battery. Good visibilty in sunlight. keyboard is tiny. can use OK Google for voice control. low res camera. Can expand memory with TF card to 32 GB for music,videos. pairs easily with bluetooth headset. I have watched YouTube on it. Some people have used this as their main phone. Since I have my cell phone with me most of the time, I primarily use my GV18. This device is a fun gadget for me that will be my back-up phone.

The right smartwatch for you is the one that best suits your needs. I would love the functionality and style of the moto 360, but with the ability to also function as a standalone phone. I think the Gear S has that ability, but too big and too expensive for me. New models coming out soon. If you need a smartwatch now, try out with cheap one and decide which functions you need, then invest in the right higher-quality model.