Well, here's a few examples from the apps on my iPhone: Tweetie 2 (very full featured twitter client): 2.8MB Things (todo list manager): 983KB Strategery (ga

Well, here's a few examples from the apps on my iPhone: Tweetie 2 (very full featured twitter client): 2.8MB Things (todo list manager): 983KB Strategery (game, simple graphics): 6.3MB Canabalt (game, slightly fancier graphics): 8.8MB iOctocat (github browser): 749KB Prowl (internet notification client): 351KB Simplenote (Note taking, iPhone/iPad universal version): 853KB Edit: A cursory run-through of the flash apps listed by Adobe http://labs.adobe.com/technologies/flashcs5/appsfor_iphone/ http://labs.adobe.com/technologies/flashcs5/appsfor_iphone/ indicates that they're all approximately 10-11MB. MTV's South Park Avatar Creator is 9.3MB. Three other avatar creators that seemed similar in the appstore averaged about 6.5MB. Not a very scientific comparison, admittedly.