Android travel guide apps

We have already created iPhone apps for a series of audio travel guides. We want to recreate the same as Android apps. The person developing this Android equivalent should have a proven track record of designing excellent mobile interfaces that can work on all Android devices (Version 1.5 and above). The main things I will be looking for is a seamless user experience. The specifications are clearly defined and already executed on the iPhone. All that is required is for the developer to replicate the experience for all Android devices. The developer will need to show previous samples of work. There will be animations, screen sliding, tabbed panels etc in the application to be developed. Work will start immediately once the developer is selected. This is a long term commitment and I am looking for an individual who can replicate the first guide, then re-work their template as far as possible for each successive guide. I am looking for an indicative cost for the first guide and then a cost for each successive guide. There is no commitment to commission more than one guide. That decision will be determined by our experience of the first app. The functionality of each guide is the same, the copy, audio and jpgs are the prime variables.