JobChangeAlert iPhone/iPad app helps you use LinkedIn effectively and has become a very popular tool for recruiters.
To extract full value from LinkedIn you need to know when your connections change their jobs. Know when your connection gets promoted, starts their own company, joins a new company or retires from their job.
The app will alert once a day with a list of LinkedIn connection who have changed their jobs. It also has a searchable list by time with all the job changes for the user to search and review when they need it. You can congratulate/message your connection from the app.