It is best to frequently update the app to fix issues and/or to add new features. Users will be notified of new app versions to quickly and easily update to the latest version. Updates can be published on request to the Bayer publishing team as a self-service.
The vendors of mobile platforms (Apple, Google, BlackBerry, Microsoft) typically follow rapid and partially automated update cycles which may introduce changes that affect your app. Make sure you are aware of forthcoming releases and have a strategy to release new a version of your app, generally within 4 weeks.