ZApps

zApps are a collection of test apps that are present in most test image variants of Windows Phone, Windows Core OS and in some builds of Windows 10 (original release). zApps are most of the time work in progress versions of apps or diagnostic and testing apps, such as zEdge or zBattInfo. The applications use a "z" prefix to make them easier to locate, as when sorting alphabetically, all of the applications will always appear on the bottom of the list. Despite that however, when zApps were first introduced in Windows Phone 7 build 6077, a "~" prefix was used instead.
The “zApps” term was never officially used by Microsoft, and is instead used by the community to describe the long list of test applications found in these builds of Windows.
== All currently known zApps ==
=== Testing and diagnostic apps ===
==== Windows 10 Mobile ====
* zAAD TB Test App is an app used for getting Azure Active Directory tokens through Tokenbroker. The app allows for the token to be taken with the UI, with Account Picker, silently for default or silently for previous.
* zAdvancedNotificationSample is used for testing tile notifications with text, local images, web images, and so on.
* zAllThingsShell is an app used for testing parts of the user interface.
* zAppIQ allows the tester to view the author, product ID and version of all apps installed on the device.
* zBattInfo is an application used for checking the Battery Status of the device. The application shows information of the Battery Driver, CAD Driver and other miscellaneous information about the battery. It can also be used for basic diagnostic features, such as starting or stopping the charging process.
* zCellular Status as indicated by the name, shows the cellular status, such as the IMEI, phone number or supported network types (such as 3G or LTE).
* zDebugMenu is used for setting specific debug settings not normally accessible on the device, such as "All XAPs are SL 8.1 XAPs", or "Start Office trace".
* zEpdDiscoverySettings is an Endpoint Discovery application.
* zFeedbackHub allows the self-hoster of the device to send feedback on their experience, view their feedback uploads and view information about the build they are currently running.
* zFiddlerClient is a client for Fiddler.
* zGestureBester tests display gestures, such as tapping, holding, flicking, double tapping, and vice versa.
* zLiveTilesApp can create a sample live tile on the start screen for testing purposes.
* zMSA is a Microsoft Account Test App used to test out the MSA ticketing feature. If the device is signed into a Microsoft account, a ticket will be returned.
* zNoCenter, although its use is unknown.
* zOsiris is a basic camera app with normally unacessible features.
* zPacmanTestApp tests tier 0 app updating.
* zPhotoPrint is a selfhost printing app that can be used to test out the printing feature.
* zPlayReady Jupiter App is used to test music and video playback.
* zSensorView is an application used for testing out the sensors on the device. The user can test the accelerometer, light, proximity, gyro and magnetometer sensors, as well as the compass, fusion and recorder.
* zStorageToolbox is an application used for managing the device's storage and testing its eMMC.
* zSystemInfo allows the user to install the diagnostic chrome feature, view the currently running processes and view other miscellaneous device details. Variants of a version without the prefix exist as well.
* zVideoTelephony, although its use is unknown.
* zUpdate is an update tool that can be used to set up automatic build updating on a self host device. The user can select an "Update Train" (switching between Production and Test builds) and view their current phone model, build and branch.
* zWavelet2 is an application used for testing the operating system's audio events. The tester can either render the audio to test it, or capture audio with the microphone.
=== Work in progress versions of apps ===
More information on these applications are available on the mentioned build pages.
==== Windows 10 ====
*zPC settings - present in build 9845 and build 9867
*zSpartan - a broken shortcut is present in build 9838
==== Windows 10 Mobile ====
*zSettings - present in build 9867
==== Windows Core OS ====
===== Andromeda OS =====
* zAndromedaSettings App - included in all builds of Andromeda OS
* zDisplayEnhancement App - included in build build 17686
* zEdge - present in build 16266
* zJournalPinApp - included in builds 17110 and 17686
* zSensorExplorer - present in build 17686
* zStartApp - included in all builds of Andromeda OS
* zStore - present in build 16266
===== Polaris =====
* zStore - a work in progress version of the Microsoft Store for the Polaris shell.
== Gallery ==
=== Windows 10 ===
File:9845-zPCSettings.png|zPCSettings in Windows 10 build 9845
=== Windows 10 Mobile ===
File:zAADTBTestApp.png|zAAD TB Test App
File:zAdvancedNotificationSample.png|zAdvancedNotificationsSample
File:zAllThingsShell.png|zAllThingsShell
File:zAppIQ.png|zAppIQ
File:zBattInfo.png|zBattInfo
File:zCellular Status.png|zCellular Status
File:zDebugMenu.png|zDebugMenu
File:zEpdDiscoverySettings.png|zEpdDiscoverySettings
File:ZAppsFeedbackHub.png|zFeedbackHub
File:zFidderClient.png|zFiddlerClient
File:zGestureBester.png|zGestureBester
File:zLiveTilesApp.png|zLiveTilesApp
File:zMSA.png|zMSA
File:zNoCenter.png|zNoCenter
File:zOsiris.png|zOsiris
File:zPacmanTestApp.png|zPacmanTestApp
File:zPhotoPrint.png|zPhotoPrint
File:zPlayReady Jupiter App.png|zPlayReady Jupiter App
File:zSensorView.png|zSensorView
File:zStorageToolbox.png|zStorageToolbox
File:zSystemInfo.png|zSystemInfo
File:zVideoTelephony.png|zVideoTelephony
File:zUpdate.png|zUpdate
File:zWavelet2.png|zWavelet2
=== Windows Core OS ===
==== Andromeda OS ====
zAndromedaSettings App-17686.1003.png|zAndromedaSettings App running on build 17686
zDisplayEnhancement App-17686.1003.png|Ditto, zDisplayEnhancement App
zJournalPinApp-17686.1003.png|Ditto, zJournalPinApp
==== Polaris OS ====
File:Polaris with the Composable shell.png|zStore running on Polaris