[efreak]

For Android, I actually prefer RedReader with ImgurViewer as an external image viewer. Both are open source apps

RedReader: https://f-droid.org/packages/org.quantumbadger.redreader and https://play.google.com/store/apps/details?id=org.quantumbad...

ImgurViewer: https://f-droid.org/packages/com.ensoft.imgurviewer and https://play.google.com/store/apps/details?id=com.ensoft.img...