The following are all distributed under the Apache 2.0 (http://apache.org/licenses/LICENSE-2.0.html) licence:
Android Support Library Document File - https://maven.google.com/web/index.html#androidx.documentfile:documentfile
Android Room Compiler - https://maven.google.com/web/index.html#androidx.room:room-compiler
Android Room-Runtime - https://maven.google.com/web/index.html#androidx.room:room-runtime
The following is distributed under the Android Software Development Kit (https://developer.android.com/studio/terms.html) licence:
Play Services Auth - https://maven.google.com/web/index.html#com.google.android.gms:play-services-auth
https://github.com/googleapis/google-api-java-client
https://mvnrepository.com/artifact/com.google.api-client/google-api-client-android
Distributed under the Apache 2.0 (http://apache.org/licenses/LICENSE-2.0.html) licence.
https://github.com/drewnoakes/metadata-extractor
Distributed under the Apache 2.0 (http://apache.org/licenses/LICENSE-2.0.html) licence.
https://github.com/guardian/Option
Distributed under the Apache 2.0 (http://apache.org/licenses/LICENSE-2.0.html) licence.
See 3rd Party Libraries for additional libraries used by all our apps.