TeleNav Launches in-App Turn-by-Turn Directions for Mobile Developers

Navigation provider TeleNav is launching what it's calling "the first HTML5 browser-based, voice-guided, turn-by-turn GPS navigation service for mobile devices." The new developer-facing service will be available here (soon). The idea is to enable mobile publishers and developers to add a single line of code and then deliver GPS-based maps and voice-guided directions within their app experience to users (via HTML5).

Remarkably, the company says the service will be entirely free and available across mobile platforms (because it's HTML5). It will become publicly available in Q1 2012. However TeleNav is soliciting developers for early testing now. 

The benefits of this are obvious. Currently on Android and iOS, any mapping request takes users out of the publisher app experience to Google-branded maps on either platform. This TeleNav functionality would not only allow publishers to retain users within apps when maps are requested but would provide voice-guided, turn-by-turn directions to locations (retaurants, hotels, shops, etc.) as well. 

I haven't spoken to TeleNav about this or the fact that they're making it free to publishers -- I'm guessing it's a branding/distribution play. But it's a pretty sweet proposition if it all works as the press materials represent.