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Android Police: http://www.androidpolice.com/2014/10/09/google-auto-refresher-erwin-goslawski-author-repetitouch-available-early-apkmirror-com-apk-download/

Tired of refreshing your Google+™ stream by hand? This app is the solution! Launch, setup and forget. From now on, the stream in your Google+ app will be refreshed automatically!

Features:

✓ Configurable refresh interval
✓ Detect when you use the Google+ app and pause refreshing for a configurable period (cooldown)
✓ Auto-start
✓ Keep screen on while running and the Google+ app shows a stream
✓ Battery-friendly

Google+ is a trademark of Google Inc.

From version Refresher 1.1.3.0:

fixed: support for more (system) languages

All versions
October 5, 2015
October 4, 2015
February 8, 2015
October 28, 2014
October 9, 2014
October 9, 2014