Apple's iPhone SDK is great news whether you're an iPhone owner an iPhone developer - or even if you plan to develop iPhone apps of your own. TechRadar caught up with leading developer Alykhan Jetha of MarketCircle Software (the company behind the Daylite business productivity suite on Mac) for his take. This is what he had to say:

TechRadar [TR]: What do you think of Apple's decision to offer an iPhone SDK?

Alykhan Jetha [AJ]: I think it was an inevitable decision because when you found out it had Mac OS X on there it was too good to be true, and if Apple didn't offer an iPhone SDK it would be shameful.

But I think they realised that anyway, because for the iPhone to really pick up it would need those custom apps that makes Apple's platform cool, and the extra value is with third-party applications on there. I think they just needed some time to get it all together and the development timeframe of the iPhone is great in terms of speed.

TR: Have you worked with the SDK yet?

AJ: No, we are downloading it as we speak. But it's very similar to the Mac OS X SDK, except that it's a touch framework.

TR: What kind of limitations have you seen with the iPhone so far?

AJ: In terms of using it, I'm very happy. I have two gripes. A lack of tasks; I use tasks and can't live without them. And the other one is push contacts and push calendars, and basically synchronizing over the air.

TR: What sort of benefits do you see in having the SDK?

AJ: It's phenomenal because it's a new platform in terms of the UI and the user experience. And yet, as developers, we have a head start because we've been using Mac OS X technologies for a while now and it's not a new stack - yet it's a new experience. So it's a pretty special moment in terms of the computing world for the event like this and the confluence of an advance OS like Mac OS X on a phone. Something like that won't happen for a while.

TR: Apple CEO Steve Jobs announced that there would be free apps and paid apps, where will you fall?

AJ: We would fall in the paid apps because we are a growing company and don't have free apps. All our software is commercial applications and the add-ons that go with them.

TR: How do you feel about the cost models?

AJ: Yeah I wasn't so happy about that, if we compare the numbers of the amount of money we spend to what we get. And even though Apple says there are no marketing fees and you get exposed to millions of iPhone owners, after a while you'll need to do additional marketing to stand out with all the apps in the App store. So the 30 per cent plus this other thing is an interesting number.

TR: So how do you compete with all those free apps?

AJ: Well that's true on the desktop too and already going on. So it goes down to the actual functionality of the app and the amount of time it takes to do it. That's where you compete - on the differentiating factors. I'm not worried about that part, just standing out in that store.

TR: How do you stand out?

AJ: You have to invest more in marketing to make sure that when people go to the app store, yours stand out somehow - either mentally or in some other way. But it will probably be a level playing field in the app store.

TR: What sort of apps do you have in mind right now?

AJ: I don't want to comment on future products because we have a bunch of ideas and we're still evaluating what we'll do.

TR: What sort of apps would you like to see on the App store?

AJ: I'm excited about the possibilities because the interaction paradigm is different - a mouse and not a keyboard or stylus. I'm looking forward to seeing apps even I haven't thought of. As an existing user with existing ideas, I like tasks and financial applications. And everything else I want from the iPhone is already there.

I'm a pretty happy user and I think the developers in the Mac community have so many cool ideas that I'm just waiting to see what people will come up with.

TR: What does this do to the jailbreak community?

AJ: I think the unlocking will continue and all those jail broken applications will quickly conform to the public API and be ready with those apps in no time.

TR: Where can we find most of your company's software right now?

AJ: We're in Apple stores and on the web via Google Adwords, but we're also in Apple's download section, and in version tracker, and Mac update, and all the places people would look for Mac OS X apps. One interesting thing about the App store is that you'll just be going to one place for your apps.

TR: What do you think about Mac OS X 10.5 Leopard?

AJ: I like it. As a software developer, it was a slightly tougher transition that we thought to make it Leopard-compliant, but beyond that I'm pretty happy with it. I didn't like the translucent menu bar and didn't like stacks, but that was fixed in 10.5.2. But nothing major and I'm happy.

TR: What do you want to see in Mac OS X 10.6?

Aj: I would like to see more access to some of their private frameworks - like control kits - and those that are not private, but I wish they were.

TR: Should we expect iPhone apps by June?

AJ: Well, I won't comment on future applications, but we'll see how it goes.