System variables reference

System variables are values calculated by the app runtime, covering things like current app version or screen width. They are automatically kept up-to-date, so e.g. resizing your screen will affect systemVars.dimensions.window, and rotating your phone will update systemVars.orientation.
They can be accessed in formula functions under the systemVars namespace. This means that e.g. os below is found under systemVars.os.
System variable
Valid values
Description
os
android, ios, windows_phone, black_berry, androidtv, tvos, tizen, webos, windows, macos, unix, linux, unknown
Name of the current operating system.
orientation
portait, landscape
Device orientation.
dimensions.screen.width
Any positive integer value
Screen width, in pixels.
dimensions.screen.height
Any positive integer value
Screen height, in pixels
dimensions.window.width
Any positive integer value
Window width, in pixels. On mobile, this is equal to screen width.
dimensions.window.height
Any positive integer value
Window width, in pixels. On mobile, this is equal to screen width.
dimensions.viewport.width
Any positive integer value
Visible viewport width excluding sidebar if exists.
dimensions.viewport.height
Any positive integer value
Visible viewport height excluding navbar and topbar if exists.
env
dev, prod
Current environment. If release management is not in use, the value is always prod.
formFactor
phone, tablet, big_screen, desktop, unknown
Device form factor.
permissions
N/A
Covered in the Permissons reference document.
buildVersion
​Semver version code, e.g. 1.0.5
Binary build version, set in the build configuration.
runtimeVersion
​Semver version code, e.g. 1.2.4
AppGyver runtime version.
buildType
client, selector
Build type. selector means the AppGyver app used to view and develop your apps.
networkStatus
none, cellurar, wifi, unknown
Network status. If there is no network, or the app is running with the web runtime, then none is returned.
runtime
web, native
Runtime type.
initialUrl
String value
If your app was launched from external URL that URL is registered intoinitialUrlsystem variable.
uriSchemes.primary
String value
This variable represent url your app can be launched from external tool i.e. mobile browser.
File system
The systemVars.filesystem object contains information about the file system of the device the app is currently running.
This information is only available on native apps, not when running on web.
Common base directories
The systemVars.filesystem.directories object contains the base directory paths available on the device. Flow functions that deal with files work with absolute paths, so a pattern you will encounter is using these at the beginning of a file path constructed with a formula, e.g. systemVars.filesystem.directories.cache + "/myTempFile.jpg".
The following directories are available on both iOS and Android.
Document
systemVars.fileSystem.directories.document
Local file system path to the document directory. This directory will only be emptied when the app is uninstalled, so it can be used to safely store files your app needs to function.
For example, /data/user/0/com.appgyver.agclient.debug/files.
Under the hood on iOS, the NSDocumentDirectory API is used. On Android, the getDataDirectory API is used.
Cache
systemVars.filesystem.directories.cache
Local file system path to the cache directory for the app. This directory can be emptied by the operating system, so it should only be used to store temporary files.
For example, /data/user/0/com.appgyver.agclient.debug/cache.
On iOS, the NSCachesDirectory is used. On Android, the getCacheDir API is used on the app context.
iOS-only directories
The directories below are only available when the app is running on an iOS device.
Main bundle
systemVars.filesystem.directories.ios.mainBundle 
Local file system path to the main bundle directory, which contains files embedded in the iOS binary. This directory is read-only.
Android-only directories
The directories below are only available when the app is running on an Android device.
DCIM
systemVars.filesystem.directories.android.dcim
Local filesystem path to the Digital Camera Images (DCIM) directory.
Download
systemVars.filesystem.directories.android.download
Local filesystem path to the downloads directory.
Music
systemVars.filesystem.directories.android.music
Local filesystem path to the music directory.
Pictures
systemVars.filesystem.directories.android.pictures
Local filesystem path to the pictures directory.
Movies
systemVars.filesystem.directories.android.movies
Local filesystem path to the movies directory.
Ringtones
systemVars.filesystem.directories.android.ringtones
Local filesystem path to the ringtones directory.
SD card
systemVars.filesystem.directories.android.sdCard
Local filesystem path to the device SD card directory.
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Contents

File system

Common base directories

iOS-only directories

Android-only directories