Pebble made crow-funding for its smart watch at Kickstarter three years ago. Now it released its latest Pebble 2. Pebble 2 has better body sign and is upgraded with heart rate check. It also introduced Pebble Time 2 as well as with heart rate check sensor. Pebble claimed that all its smart watches will be upgraded with heart rate check feature in the future.

Pebble considers health tracking has become an important element as well as notification and basic communication for smart watch. It realized that it has to keep innovation to compete with the giants.

Pebble 2 is thinner than its last generation. It applied the black and white display. Besides the optical heart rate check sensor, Pebble 2 is equipped with microphone.

While Pebble Time 2 combined the features of Pebble Time and Pebble Time Steel. It is made of stainless steel material. It is waterproof as well.

The battery life is an important feature for Pebble smart watch. It is said that Pebble 2 can keep working for one week while Pebble Time 2 can keep running for 10 days.

Pebble 2 and Pebble Time 2 are available on Kickstarter. Pebble 2 charges $99 which is supposed to be delivered in September. Pebble Time 2 charges $ 169 and will be delivered in November.

Even though Pebble updated the heart rate sensor for its new releases, there are already similar smart watches on the market. It might not help a lot for Pebble to gain more user share.

Pebble CEO & Co-founder Eric Migicovsky claimed the firm has already sold 1.8 million Pebble smart watches. This figure is just a small portion compared with Apple Watch, Fitbit wearable devices.