GAE (Google App Engine) is a platform for developing and hosting web applications in Google-managed data centers. It was first released as a beta version in April 2008. GAE is cloud computing technology. It virtualizes applications across multiple servers and data centers. GAE is Platform as a Service while AWS (Amazon Web Services) is Infrastructure as a Service.
GAE is free up to a certain level of used resources. Fees are charged for additional storage, bandwidth, or CPU cycles required by the application.
The applications of the logged Google developer are available at https://appengine.google.com/
The dashboard allows to manage the different applications (quotas, instances, logs, cron jobs, task queues, blacklists, datastore, blob viewer, settings, permissions, billing, resources, …). A very efficient feature is the version control based on the app.yaml file :
Another useful feature is the error logging :