It's Android's first OpenOffice Document Reader!
Full Changelog: https://github.com/opendocument-app/OpenDocument.droid/compare/v3.19...3.24
Full Changelog: https://github.com/opendocument-app/OpenDocument.droid/compare/v3.12...v3.19
Full Changelog: https://github.com/opendocument-app/OpenDocument.droid/compare/3.3.4...v3.12