This is an advice question on mobile application development.
When you guys create a mobile app , for iPhone or android phone...
How do you guys normally perform load testing?
do you guys use and IDE? open source test software? commercial test software?
For example, if I create a mobile app and want to deploy it to both app stores how can I test it to make sure it can handle many users and it doesn't crash when many people are using it.
How do the pros test such a scenario?