Android requirements

• The Android SDK is provided as an independent Android library module
• The SDK is using the Androidx support library structure
• The SDK targets devices having a hardware backed keystore. Device types without this will be rejected
• Devices must have lock screen enabled
• The SDK minimum version is Android 6 Marshmallow (ApiLevel 23)
• Some ApiLevel 23 devices lack secure HW and are not supported by the SDK.

The following link provides data about the relative number of devices running a given version of the Android Platform.