
The battle of the smartwatches —
The Pebble Watch first gained attention by pulling in more than $10 million on Kickstarter. Pebble connects to an iPhone or Android phone via Bluetooth and has a growing selection of its own apps.

The battle of the smartwatches —
Unveiled by TomTom in 2013, the new Nike+ Sportwatch colors have been chosen to match Nike's apparel and shoe ranges. Features include an extra-large display, a graphical training partner and a one-button control. Colors include black/anthracite, anthracite/blue glow and volt green.

The battle of the smartwatches —
The Italian-made aluminum "I'm Watch," announced at the 2013 Consumer Electronics Show, sells for $249. It comes in seven colors and runs the Droid 2 operating system. It connects to Android smartphones using Bluetooth.

The battle of the smartwatches —
A full-color touch screen device, the $130 Sony SmartWatch only syncs with Android devices. When paired with a phone over Bluetooth, it can receive notifications for email, texts, social networks and calendars.

The battle of the smartwatches —
The Motoactv smartwatch is marketed as a fitness tracker. It acts as a heart-rate monitor and pedometer, has GPS and an MP3 player. There are also a number of off-the-wrist mount options, including a handlebar strap, armband and chest strap.

The battle of the smartwatches —
The MetaWatch has a retro-looking, black-and-white screen, but it can connect to newer iPhones in addition to Android devices. It is also a water-resistant sports watch that tracks pace and distance. The watch starts at $179 and is available with various colored bands or in black or white leather.

The battle of the smartwatches —
J.K. Shin, head of Samsung Mobile Communications, presents the Samsung Galaxy Gear in Berlin in 2013. Six months later, a second-generation watch featured a new operating system and more processing power.

The battle of the smartwatches —
The Samsung Gear S, the company's third-generation smartwatch, made an advance many users, and reluctant nonusers, had been clamoring for. It has 3G connectivity and can be used without tethering it to a smartphone. Unveiled August 27, it is scheduled to ship in October, with no price yet announced.

The battle of the smartwatches —
The long-rumored "iWatch" from Apple could take the same approach, or, like others, require a connection with a smartphone. Health and fitness apps are expected to be front and center on the new device.

The battle of the smartwatches —
Apple's products have already been used as de facto smartwatches. The iPod nano's small, square touchscreen was a natural fit for the wrist. Spotting the potential to turn the iPod into a watch face, companies such as Lunatik make kits that included mounts and slick straps.

The battle of the smartwatches —
Apple is expected to roll out its entry in the field this week. Could it look like this concept design?


