No support for Android versions earlier than 4.4 on mobile devices
Valid from Pega Version 7.3
Pega® Platform dynamic layouts by default now use Flexbox-based rendering. As a result, mobile devices running on Android versions earlier than 4.4 are not supported in Pega Platform. Such devices cannot render correctly with Flexbox because the Pega Mobile Client includes the default stock browser on the Android operating system.
Package caching is not supported in offline-enabled applications built with the UI Kit 7 (09-01-01) portal
Valid from Pega Version 7.3
When you create an offline-enabled application in Pega® Platform, by default, it uses a portal with the UI Kit 7 (09-01-01) ruleset. In such a case, the package caching functionality cannot be used. You must either disable caching on the Advanced tab of the Access Group rule form, in the Offline Configuration section, or use an adaptive design instead of rendering different elements for different devices with the UI Kit 7 (09-01-01) ruleset.
For more information, see Access Group form - Completing the Advanced tab.
No video controllers displayed on Android 4.3 and earlier versions
Valid from Pega Version 7.3
When you preview a video clip within Pega® Mobile Client on a mobile device that runs Android 4.3 or earlier versions, video controllers are not displayed in full-screen mode.