Skype for Apple iPhone OS4

David Ponsford demonstrated Skype as a background app at last week's Apple briefing on the iPhone OS 4, coming mid-2010. John Chang, Skype's lead iPhone developer, helped with the demo. David came to Skype from SpinVox Skype's voicemail-to-text partner.

Several features announced at the OS4 preview event affect Skype. Multitasking, location services, data encryption service, and a user alerting service. David answered a few questions by email.

Skype Journal: Now that two apps can be running at the same time, will OS4 let Skype expose its own APIs to third party Apple developers to build iPhone or iPad plug-ins? Are apps now allowed to talk with each other?

David Ponsford: Co-operation between 3rd party apps was not something that was discussed at the iPhone OS 4.0 preview by Apple.

Skype in the iPhone's background, shown on a second status bar, at the top.

SJ: What does Apple's encryption service add beyond what Skype for iPhone does now? Could there be efficiencies? Will OS4's encryption protocols be compatible with Skype's? Aside from encrypting Skype-to-Skype and Skype-to-Server communication, might they be used to increase the privacy of Skype data stored locally on an Apple mobile device?

DP: We are still evaluating Apple’s new enterprise features. All Skype-to-Skype communications are encrypted, as a matter of course. Our users’ privacy is of paramount importance to us.

SJ: Which of Skype's features will be turned off when running in the background? Will Skype's SILK codec be available during background calls?

DP: We are still evaluating all the new features available to us as part of the iPhone OS 4.0 developer preview that was released on Thursday. Early indications are that that Skype-to-Skype calls will still use the full capabilities of the SILK codec, even when they are in the background.

SJ: I haven't seen any Skype alerts on the iPhone so far. Does Skype use the existing alert service? For which notifications? Will you change the types of alerts Skype uses to communicate with a user? The frequency?

DP: Thursday’s technology demo of iPhone OS 4.0, in which Skype participated, used the new local notification system to show that an incoming Skype call was happening.

SJ: Apple is creating stronger technical and experience design differences between the 3GS and earlier iPhones, the iPod Touch family, and the iPad. Will Skype need to offer different software for the platforms or will you be able to offer one OS4 app that adjusts to each device?

DP: It is too early for Skype to give a definitive answer on this specific point; however, it will be our goal to make a single download available to all iPhone users that want Skype, making it super simple to get Skype for your iPhone, with all the features available for it.

SJ: Now that location services are available to Skype through APIs, what will you consider before making it easy or automatic for users to pipe their location into their Skype's presence?

DP: If Skype believes there is a significant benefit to our customers to offer location-based services, we will look at how these can be offered, while making sure that privacy and other customer experience issues are taken into account at the same time.

SJ: Skype on Verizon Android and Blackberry phones is promising betting integration with native address books. Do the OS4 APIs make it easier to offer similar sync, data population, and dialing features in Skype?

DP: Skype will be evaluating the new APIs available to all developers in order to understand what new features they offer us in order to create the best user experience possible for our users.

SJ: How did you wind up on stage in Cupertino?

DP: My dashing good looks, confusing accent and need to get Gold status on Virgin Atlantic...

SJ: What's Steve Jobs' Skype name?

DP: I don’t know this one. J

tags: skype, apple, iphone, mobile, ipod, os4

Call me at +1-510-316-9773, Skype me, follow @skypejournal and @Phil Wolff.
Visit our Skype Journal private technologist roundtable, one of the longest running public Skype chats.