For now, though, Ovemar says, Toca Boca will focus on fitting the iPhone 5's screen "with our new projects, but not necessarily update all our existing apps to take advantage of the extra pixels."

Greg Pierce of --the company behind apps like and --agrees with Ovemar's contention that adapting his apps for the new screen size isn't overly burdensome: "I could choose to be grumpy about a new piece of hardware making work for me, or I can just be excited about the new capabilities the update creates," Pierce said. "I choose the latter."

Luckily, he says, rejiggering his apps for the larger screen doesn't necessitate tons of work: "Most of my applications are productivity apps that rely more on standard iOS controls that can adapt to the different screen sizes without requiring a significant number of additional graphics."

That's the same situation Paul Haddad of --the maker of --describes: "For 'tableview' style apps like Tweetbot ... the iPhone 5 shouldn't require a ton of new assets." Haddad pointed out that apps that use a lot of custom graphics, like games, "could be a lot harder" to adapt.

David Barnard of --which makes among other apps--told that adapting to the iPhone 5's screen size "seems to be pretty easy" for his company's apps, but added: "I'm most concerned about ... shipping software optimized for a device I've never touched." Just like developers who wanted to have iPad apps available in the App Store on day one of that device's arrival, those who are aiming to have iPhone 5-optimized apps available by the phone's September 21 launch date can only guess about how their apps will truly look and feel on the taller iPhone in practice.