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universal apps in Windows 10. But before I get into that, let me explain what a universal app means. A universal app is an app that works similarly across all Windows 10 devices, namely the phone, PC, and tablet. For developers, this means an app can be written once to run on a variety of devices. In this book, I do not go into the details of the development of universal apps. I stick to the user-facing features. As I have emphasized in previous chapters, Windows 10 is all about providing the user a unifying experience across devices; a universal app stands true to that. The convergence of all platforms running on one unified Windows core enables a single app to run on different devices. So the same app can run on your PC, your tablet, and on your Windows Phone. In all the previous versions of Windows, a single app would have different experiences on different Windows devices. Windows 10 gets rid of that, and gives the user a unifying experience.
    In this chapter, I show you how some of these universal apps look and feel exactly the same on all of your devices, because they are the same app running everywhere. I show you what is new with the Mail, Calendar, Photos, Music, and People apps, as well as some of the Microsoft Office apps.
    In this chapter, I am going to show you how to tell whether an app is a universal app or not, show you some of the universal apps that come built-in with the Windows 10 platform, and tell you what’s new with them. I am going to cover the Mail app and Calendar app, and tell you about their new features. Later I show you the fun and cool Photos and Music apps. I then go into the People app to show you the new things that you can do with it. I also show you how to sync all your photos into one location. At the end, I focus on the Office apps, particularly Word and PowerPoint, which also work exactly the same way on all of your devices. I use Windows 10 tablet screenshots, but please bear in mind all the apps look and feel the same on all of your Windows 10 devices (per the Continuum feature).
    Table 4-1 provides a summary of this chapter.
    Table 4-1.   Chapter Summary
Problem
Figures
How to tell whether it is a universal app or not
4-1 to 4-2
Mail and Calendar apps
4-3 to 4-15
Photos app
4-16 to 4-19
Music and Videos apps
N/A
Microsoft Office apps
N/A
Note
I use Windows 10 tablet screenshots throughout this chapter. As the definition of universal apps holds, all of these apps look the same on all Windows 10 devices.
    How to Tell Whether It Is a Universal App or Not
    There is a neat little icon to identify universal apps; it looks like a computer and a phone overlapping each other. This icon represents the sharing experience, which is unifying across devices. When you search for an app in Windows Store, the app snippet shows you the icon to determine whether it is a universal app or not, as seen in Figure 4-1 .

    Figure 4-1.   Universal apps have the icon of a computer and a phone
    Furthermore, when you select the app, Figure 4-2 shows that you can see the icon on the following screen. The icon is clearly seen in Figure 4-3 .

    Figure 4-2.   The icon identifies a universal app

    Figure 4-3.   The universal app icon (a phone overlapping a computer)
    Mail and Calendar Apps
    The new Mail app brings all of your e-mail accounts into one place, similar to what the desktop mail client has been doing. Of course, this is different than the current “link inboxes” function in Windows Phone 8.1. This new Mail app is universal and behaves in the same way across devices.
    Upon opening the Mail app, you are welcomed with a clean-looking screen, like the one seen in Figure 4-4 .

    Figure 4-4.   The Welcome screen of the Mail app
    The Get started button takes you to the account screen that you already have on your phone, or the Add account screen, where you can add an account, as seen in Figure 4-5 .

    Figure 4-5.   The “Add account” screen on the Mail app
    Once you are inside the account, the