What do you use as a backend service for app apps?

?? What do you use as a backend service for app apps?

is Ruby on Rails or PHP?

Php+mysql as the backstage of Android app: http://www.tutorialspoint.com/android/android_php_mysql.htm

Php+mysql as the Web service backend for the iOS app:

Http://www.raywenderlich.com/2941/how-to-write-a-simple-phpmysql-web-service-for-an-ios-app

Http://php.about.com/od/learnmysql/fl/Using-MySQL-with-iOS.htm

Ruby on Rails as an app backstage:

https://matteomelani.wordpress.com/2011/10/17/authentication-for-mobile-devices/

http://collectiveidea.com/blog/archives/2013/06/13/building-awesome-rails-apis-part-1/

Http://railscasts.com/episodes/350-rest-api-versioning

You can also use the Open source Baas project as a background:

Baasbox:

http://www.baasbox.com/features/

Https://github.com/baasbox/baasbox

Dreamfactory:

Https://www.dreamfactory.com/features

Https://github.com/dreamfactorysoftware/dreamfactory

There are some companies or projects that specialize in Baas (backend as a Service) abroad, and can refer to:

http://www.raywenderlich.com/20482/ How-to-choose-the-best-backend-provider-for-your-ios-app-parse-vs-stackmob-vs-appcelerator-cloud-and-more

http://nordicapis.com/why-you-should-build-apps-with-an-api-backend-baas/

What do you use as a backend service for app apps?