soon as Pebble ships, developers will be able to use the API calls described on developer.getpebble.com to integrate their apps with Pebble Notification API: Web developers will be able to add Pebble integration to their webapps as well. We're building an OAuth 2.0-enabled endpoint linked to the Pebble Account system. After asking Pebble users to authenticate, Notification API-enabled webapps will be able to push notifications, alerts and other data directly to a Pebble. The API takes care of all the communication between the web, phone and Pebble. Watchface SDK: All the tools needed to create your own custom watchface for Pebble. This is our first experiment with 3rd party code running directly on Pebble's microcontroller. Developer tools and documentation are the most difficult part of this SDK stage. iOS SDK: Things are a bit more complex on iOS. There is no simple method for doing interprocess communication between apps. We're pursuing a few different options. We're confident that the solutions we're building will work. Expanded Native SDK: At this stage we'll expand the featureset of the native development platform introduced with the Watchface SDK. Think games, sleep trackers, remote controls and other more complex apps. Thanks for bearing with me through this long update. If you have any questions, please do not hesitate to email kickstarter@getpebble.com. Thanks again for backing Pebble! Due to extraordinary interest from our backers, we've decided to introduce a 5th Pebble colour option: Grey! Here's the current state of the Pebble rainbow: Here's a render of