Firstly thanks very much for all your efforts in keeping these frames relevant.
I previously used the Electric Objects web login to point my frames to Google Slides embedded URLs. I made slideshows including realistic looking photo frames, and multi-picture frames (slides) etc, and that worked great. When I powered on the EO2s, they'd boot up and access the URLs then the slideshow would start.
Here's a link to how that works in Google Slides, the Electric Objects website is obviously gone but it had an option to display a URL, which I don't think was available on the apps.
https://support.braincert.com/kb/article/198/creating-a-google-slides-embed-url-a-detailed-step-by-step-guide
Would it be possible to have this option built into your APK? This would get around the 'public' image issue on Flickr.
Thanks again for your time.