remike I think maybe the best path to follow would be to merge both ideas. Starting with an app with the Alerts panel and push Notifications. Then, adding more of the features of GG.deals, like price comparison, price history charts, deals, news, collection, etc.
This way you would have the best features for an app before and then keep adding functionality to make the app full fledged.
BTW I would looooove to have push notifications