When just getting started with app development, there seems to be information just about everywhere on the web. Below are links to various information needed for app development and marketing.

WordPress Resources

WordPress.org
https://wordpress.org/

Using FeedBurner with WordPress
https://codex.wordpress.org/Using_FeedBurner

Free Themes Directory
https://wordpress.org/extend/themes/

Apple Developer Resources

Apple Developer Center
https://developer.apple.com/

Apple iTunes
https://www.apple.com/itunes/content-providers/book-faq.html

Custom Icon and Image Creation Guidelines
https://developer.apple.com/library/ios/#documentation/userexperience/conceptual/mobilehig/IconsImages/IconsImages.html

Prepare for App Submission
https://developer.apple.com/appstore/resources/submission/index.html

Creating Your App Record in iTunes Connect
https://developer.apple.com/library/ios/#documentation/ToolsLanguages/Conceptual/YourFirstAppStoreSubmission/CreateYourAppRecordiniTunesConnect/CreateYourAppRecordiniTunesConnect.html

Press Release Resources

Writing an iTunes App Description - Moms With Apps
https://momswithapps.com/2011/04/18/writing-an-itunes-app-description/

Google Developers Press Release Template
https://developers.google.com/google-apps/marketplace/press_release_template

Free Press Release Templates
https://www.pressreleasetemplates.net/

Yahoo! PR Newswire Press Release Wizard
https://smallbusiness.yahoo.com/advisor/business-tools/press-release-wizard/?s_sem=advisor_acq_pressreleasewizardlaunch_20120514

Facebook Resources

FeedBurner
https://feedburner.google.com

Involver
https://www.involver.com/applications/

NetworkedBlogs
https://www.networkedblogs.com/

Pinterest
https://pinterest.com/

WooBox
https://woobox.com/

Books and Sites that have helpful information about marketing children's apps

Children's Book Insider
https://cbiclubhouse.com/clubhouse/

The Digital Media Diet
https://digitalmediadiet.com/

Elizabeth O. Dulemba
https://dulemba.com/index.html

Karen Robertson - Digital Kids Author
https://digitalkidsauthor.com/

Katie Davis
https://katiedavis.com/category/marketing/