I had a quick search of the forums and couldn’t see this app suggested anywhere. Obtanium is an Android app that can download the latest apks from a given source such as Github. Perhaps it could get a mention in the RSS section of the guide for installing Android apps?
Hey! Obtainium is definitely on our radar. We are following the progress on Figure Out Silent/Background Updates · Issue #25 · ImranR98/Obtainium · GitHub which is the feature that would make it something with a clear benefit over just an RSS feed reader like Feeder or Read You.