
 Rails 4 came out two weeks ago, and are you still sitting on third? Does the laborious process of checking the performance of all connected gems stop you? No problem! Just 10 days ago, a web service for checking 
gem compatibility and Rails 4 from 
frodsan and 
Florent started .
In order to check the performance of gems, you must copy the contents of your gem file and paste it on the page 
http://ready4rails4.net/gemfile_check/new .

Then click on “Check my Gemfile!”, And you will see the status of your application gems:
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At the moment, 692 hemes are registered in the project, 175 of them are compatible, 31 are not, and nothing is clear about the remaining 485 gems. You can help yourself and others in this difficult task by adding information at 
http://ready4rails4.net/gems/new .
PS The site was created using 
Boostswatch Cyborg , its source can be found in the project on 
GitHub: ready4rails4 , and it is hosted on 
Heroku .