A "report" from a recent event was sent to participants in the form of an OpenDocument Presentation Document Format (ODP).
(the "free" equivalent for PowerPoint, as used by LibreOffice and OpenOffice programs)
The presentation is mostly photos taken at the event, maybe some shot videos too.
How to view the file on a phone?
I am asking for both Android and iPhone (and iPad).
I tried the often recommended OOReader app (appstore link) on iPhone, but it has a file size limit of 20 MB and our presentation file is bigger. Similar is the Libre Office viewer Lite app, it crashes a few seconds after opening the file.