How to release a bug-free application?
Write comprehensive unit tests for your code and run them regularly.
Use a debugger to test your code as you write it.
Make sure to test your application thoroughly before you release it.
Use beta versions to test your application in a realworld environment before you release it to the public.
Plan to deal with bugs that are found after the release of your application.
Take care of your application quality. Get your application tested before release with more helpful QA practices: www.testrigtechnologies.com