So I've been using the Photos app (even when it was under Google+) - but the new version of the app has some pretty decent needed features. The "assistant" in the Photos app gave me a message asking me to delete photos over 30 days old from my device to save some phone space. Love it.
[IMG] http://i.imgur.com/yyNOafU.png[/IMG]
[IMG] http://i.imgur.com/yyNOafU.png[/IMG]