Notification on new app version in IOS app store

Is there a way to be notified when a new version of an application is published to the app store?

I don't mean the general notification on the app store when opened. I would like to get an email or equivalent as soon as a new version is published in the app store. I need to track the version available in the app store for several applications at once.

No, there's no way to do this from the App Store. Developers do not have access to any Apple API to notify users when a new version is available within the App Store.

Developers can notify users within their own app that a new version is available. For example, I have several apps that send me a popup message about a new version but I must open an older version of that app first, before I can see the notification.