Tree Valuation App Development

I'm seeking an experienced mobile app developer to create a tree valuation app for both iOS and Android platforms. The app's primary function should be to calculate the value of a tree based on specific inputs.

Core Functionality:
- Calculating tree value based on inputs

Valuation Inputs:
- Tree condition
- Tree height
- Tree age
- Diameter of trunk
- Visibility of tree
- Historic significance

Ideal Skills and Experience:
- Proficiency in cross-platform mobile app development
- Strong background in building calculation-based apps
- UI/UX design skills for intuitive user experience
- Experience with both iOS and Android deployment

Please provide examples of similar work done.