You should investigate how many instances each of your applications used in March and compare that with the amount in April. If you changed your applications' scaling settings it would have directly affected instance count, and in turn the amount of instance hours you use.
It is also recommended to make sure you are stopping previous versions of your applications in the Cloud Console <https://console.cloud.google.com/appengine/versions>, as older versions can still be serving with instances. - Note that Google Groups is reserved for general product discussions and not for technical support. It is recommended to open a free Billing Support case <https://support.google.com/cloud/contact/cloud_platform_billing> for any billing related inquiries. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/8f11c1c8-9934-4692-93dc-2847d71afa9d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
