Not updated and anymore, the content of the app might be old or obsolete!
A great app to learn how to earn money.
resources:
moz.com
yoast.com
seo.qalebfa.ir
hamyarwp.com
www.irhostco.com
www.searchengineland.com
www.sitepoint.com
www.stateofdigital.com
seo-hacker.com
websitehelpers.com
searchenginewatch.com
www.tipsandtricks-hq.com
academy.hubspot.com
blog.hubspot.com
blog.kissmetrics.com
support.google.com
smashingmagazine.com
www.google-penalty.com
www.bruceclay.com
blog.crazyegg.com
graphpaperpress.com
toprankblog.com
wordtracker.com