||This article's introduction section may not adequately summarize its contents. (July 2013)|
|Also known as||Pebble|
|Generation||2 (Pebble Steel)|
|Introductory price||Kickstarter backers: USD 115
Pre-orders: USD 150
Retail: USD 150 Pebble Steel: 250
|Operating system||Pebble OS, customized FreeRTOS. Can communicate with Android and iOS apps using Bluetooth. Pebble OS is closed source.|
|Power||7 days (assuming ~20-30 notifications a day, and a per-minute updating watchface.)|
|CPU||STM32F205RE Cortex M3 CPU|
|Memory||RAM between 64kb and 128KB|
|Storage||8 app/watch faces (1024KB Flash Memory)|
|Display||144 × 168 pixel LCD|
3-axis accelerometer with gesture detection
magnetometer and ambient light sensor
|Connectivity||Bluetooth 2.1 (default), 4.0 (used for iOS 7 notifications) + EDR|
|Dimensions||50.33 mm (1.981 in) H
32 mm (1.3 in) W
8.44 mm (0.332 in) D 
|Weight||Pebble: 1.34oz Pebble steel: 1.97oz (with default watchband attached)|
|iPhone and Android|
|Related articles||smart watches|
The Pebble is a smartwatch developed by Pebble Technology and released in 2013 that was funded via the crowd funding platform Kickstarter. The Pebble raised $10.2 million for Kickstarter, making it the most successful product ever released by the company. Best Buy, an American consumer electronics corporation, began selling Pebble smartwatches in July of 2013, and sold out within five days. The Pebble is compatible with iPhones and select Android devices. When connected to your phone, it is able to receive a vibrated alert to text messages, emails, incoming calls, and notifications from social media accounts, Facebook and Twitter. The Pebble can hold up to eight apps at a time, that can all be bought on the iPhone and Android app stores. The new Pebble Steel is available in Brushed Stainless and Black Matte.
The Pebble Watch was designed based on a concept by Eric Migicovsky describing a watch that could display messages from a smartphone. Migicovsky successfully took his idea through the Y Combinator business incubator program, and unusually for a startup company at Y Combinator, Migicovsky's business actually generated revenue during the program. Migicovsky was able to raise US$375,000 from investors such as Tim Draper of Draper Fisher Jurvetson, but was unable to raise additional funds. Discussing his inability to raise further funds, Migicovsky told the Los Angeles Times, "I wasn't extremely surprised... hardware is much harder to raise money for. We were hoping we could convince some people to our vision, but it didn't work out."
After raising venture capital for the product under their former name inPulse, the company failed to attract traditional investors under their new brand name, so the company requested crowd funding in April 2012.
Migicovsky's company Pebble Technology launched a Kickstarter campaign on April 11, 2012 with an initial fundraising target of $100,000. Backers spending $115 would receive a Pebble when they became available ($99 for the first 200), effectively pre-ordering the $150 Pebble at a discounted price. Within two hours of going live, the project had met the $100,000 goal, and within six days, the project had become the most funded project in the history of Kickstarter, raising over $4.7 million with 30 days left in the campaign.
On May 10, 2012, Pebble Technology announced they were limiting the number of pre-orders. On May 18, 2012, funding closed with $10,266,844 pledged by 68,928 people.
Pebble entered mass production in January 2013 with a planned production of 15,000 watches per week. Pebble Technology was expected to begin shipping units on January 23, 2013. As of July 4, 2013, Pebble sold over 85,000 units.
The watch has a 1.26-inch 144 × 168 pixel black and white e-paper display using an ultra low-power "transflective LCD" manufactured by Sharp with a backlight, a vibrating motor, a magnetometer, ambient light sensors and a three-axis accelerometer. It can communicate with an Android or iOS device using Bluetooth 2.1 and includes support for Bluetooth 4.0 (Bluetooth Low Energy) for a later update when more phones support it. The watch is charged using a modified USB-cable that attaches magnetically to the watch to maintain water resistance capability. The battery was reported in April 2012 to last seven days. Based on feedback from Kickstarter backers, the developers added water-resistance to the list of features. The Pebble has a waterproof rating of 5 atm, which means it can be submerged down to 40m and has been tested in both fresh and salt water, allowing one to shower, dive or swim while wearing the watch.
The Pebble was slated to ship with apps pre-installed, including a cycling app to measure speed, distance and pace through GPS, and a golf rangefinder app that supports more than 25,000 courses. These apps use data received from a connected phone for distance, speed and range information. More apps will be downloadable from the phone, and an SDK will be freely available. Not all apps will be installed when the watch ships but CEO Eric Migicovsky announced on January 9, 2013 that there will be updates for the watch's OS (which is based on FreeRTOS) every 2–3 weeks until all features are added.
Pebble Technology announced that an open Pebble software development kit (SDK) would be released before shipment of the watches began. A proof-of-concept watchface SDK and documentation were released on April 12, 2013. The released SDK was limited to development for watch faces, simple applications and games. The second release of the SDK (now known as PebbleKit) was released on May 17, 2013, adding support for two-way communication between Pebbles and smartphones running iOS or Android via the AppMessage framework.
The first edition of the Pebble was released to mixed reviews. The design was acclaimed for being innovative, and the watch vibration results in higher awareness of phone alerts. For the Pebble Steel model reviewers noted the large price jump from $149 to $249 USD, the continued lack of touch-activation, and the cosmetic overhaul described as "less-geeky". 
The Pebble Steel is the next generation of Pebble. The Pebble Steel has a smaller steel body and a charging light. It features a new charging cable, the pebble logo at the bottom and comes with two watch bands - metal and leather.
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|Wikimedia Commons has media related to Pebble Smartwatch.|
- Official website
- Pebble: E-Paper Watch for iPhone and Android at Kickstarter
- Pebble: E-Paper Watch for iPhone and Android at Kicktraq.com