I am an experienced developer of mobile applications, for Android, iPhone and iPad. The best way to see what I'm capable of is to look at my Tubewalker app, which is available as a free download for iPhone, iPad and Android. In this application – which is based around a three-month walk I did along every line of the Tube network – you can see a number of my skills, including:
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Interface Design: I put a lot of effort into the look and feel of the Tubewalker app, and I think it shows. The app works equally well in portrait and landscape mode, and the interface is clean and attractive (or, as various reviewers have put it, it has a 'great interface', is a 'great-looking app', is 'well thought out and presented', and is 'really well designed'). I worked hard to make the user interface very similar in iOS and Android, while adhering to the different user interface guidelines on each platform.
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Tablets: The iPad version of Tubewalker really makes the most of the large screen size. In the phone versions of Tubewalker, the information for each tubewalk is shown in separate screens: one for the walking map, another for route information, a third for places of interest and a fourth for photographs. On the iPad, all four screens are combined into one large map view, with a split screen controller allowing each access to all the information for a particular walk. The different blocks of information allow greater interaction, so tapping on a place of interest shows that place on the map, while tapping on a map pin pops up information about that place.
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Pricing: I have experience of both in-app purchasing (in the iPhone version of Tubewalker) and having free and a paid versions (iPad and Android).
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Old OS Support: My apps run on a broad range of operating system versions. My iPhone app runs on all versions of iOS from 3.0 upwards, while the Android version works from 2.1 upwards. As I extend and enhance the apps, I strive to maintain compatibility with old versions.
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App Store Experience: The Apple App Store and the Android Market can be harsh places, and I've learned a lot about what to do (or, more accurately, what not to do). The Tubewalker iPhone app comes with zone 1 unlocked for free, with an in-app purchase available for zones 2 to 9, and when I first launched the app I showed all the locked content in the app, but greyed it out until you paid for it. This meant that people who were expecting lots of content for free couldn't see the wood for the trees and rated the app accordingly, but a swift change to a less invasive upgrade model fixed this. In a later release, I accidentally broke the app in an old version of iOS, which garnered yet more one-star reviews, and although I fixed the issue as soon as I found out about it, I learned the hard way that faulty iPhone apps can seriously damage your ratings.
In summary, I am an experienced developer of Android and iOS applications, but don't take my word for it: download my app for free (it's available for Android, iPhone and iPad) and make up your own mind.