3. Windows and Windows Phone Application Model Universal Apps What’s new in Windows Phone 8.1 3

4. Deployment Execution Storage Navigation OS Integration Notifications 4

6. Convergence Begins with IE WP 7.5 shipped with IE9 Same IE codebase as Windows Same JavaScript engine as Windows Converged Core OS Common NT kernel, file system and core networking, secure boot, BitLocker Developer Platform Partial API convergence Native Code (C++) and DirectX IE10 Converged Dev Platform More code and skillset reuse Aligning the Stores Shared dev registration Shared entitlement Common Core Platform Proximity & Location frameworks Security & identity Background Tasks

7. Windows Phone Only Windows Only

13. Primary Tile Resume your app as the user left if rather than starting it fresh Start the app fresh if a long time has elapsed since the user last access it When in doubt, provide the user with a choice Avoid stranding users coming from Deep Links Phone Back button takes users where they came from

14. Windows Phone 8 enabled: Run well on 512Mb devices Run great on >512Mb Guaranteed User Experience Windows Phone 8.1 goes further to make the experience more fluid

16. System monitors how much memory your app is using over time Adjusts memory cap for app based on this data Result More apps stay in memory 512 Mb – some apps resume >1Gig – nearly all apps resume

19. TriggerUsage System Trigger UserPresent, UserAway, SessionConnected, TimeZoneChange, NetworkStateChange, InternetAvailable, ServicingComplete Run code on system events TimeTriggerData synchronization MaintenanceTriggerPerform maintenance work on AC power

22. APIs to enable geofencing Location triggers Up to 1000 geofences Geofencing experience App registers for a number of geo-coordinate anchors with a radius around that point When a user enters that geofence, the app is triggered and app execution can happen

33. Same format for Windows & Phone (APPX) Split out resources into separate packages Data efficient download 720p Manifest(s) 1080p Spanish German Italian French English WVGA DLLs

34. App Data roaming with Windows apps Start Screen Backup Tile metadata and layout is backed up to OneDrive daily App Data Backup App decides what data gets backed up to OneDrive RoamingLocalTemp RoamingLocalTemp Roaming 100kb Device A Device B

35. Enables user-driven data sharing between apps Same programming model across Windows User experience scales to device Apps can freely share content, with no limitations on content type Optimized to ensure works on low end devices

37. Apps run better on all your devices WNS and Action Center Enhanced multitasking Enhanced deployment options Backup & Roaming

40. www.microsoft.com/learning http://developer.microsoft.com http://microsoft.com/technet http://channel9.msdn.com/Events/TechEd