The long awaited Gmail Push Notification Service is not coming from the search engine giant and creator of Gmail, Google, but from Tiverias Apps: a non-related company specializing in productivity enhancing applications for the iPhone and iPod Touch. Tiverias Apps have released a statement saying that "GPush is the missing link between GMail and the iPhone. For the first time, receive instant Gmail message notifications". The application was released on the App Store earlier this month but was taken down just hours after its release due to server complications. Tiverias have subsequently fixed the problem and have used this downtime to address other issues and concerns with the application. The downtime serves as both a fix and an update.
In essence, the application will mimic what it is like to receive a text message, where a user is alerted and a notification is shown on the front screen displaying what the message says. Several applications already take advantage of push notifications, but none have been posted to the App Store that allow push notifications of incoming mail.
Users should see signs of increased battery life as well, as data will be pushed instead of pulled. Under the current system, the Mail application operates under "Fetch", a feature that pulls data to the iPhone at specified intervals (usually every 15 minutes). With the arrival of push notifications, data can now be pushed to a phone from external servers as opposed to be being pulled by phone:
Fetch (Data Pulling)
iPhone --> Talks to servers --> Pulls any data from servers
Push (Data Pushing)
Servers talk to Apple --> Apple Push Notification Service --> iPhone
As you can see, in the former (fetch) it is the iPhone that does all the work. With push, it's the third party servers.
We'll have a review of GPush up within a few days of its release. Check back soon!