TradeMate: Job Site Efficiency App

I'm looking for an experienced mobile app developer to build TradeMate, a productivity app for tradespeople. The app aims to streamline job site operations for carpenters, welders, machinists, electricians, and builders. It should be available on both iOS and Android platforms.

Key Challenges to Address:
- Scattered Measurements: Centralize and organize job site measurements
- Lost Material Lists: Create and track comprehensive material lists
- Unclear Job Instructions: Provide clear, concise, and accessible job instructions
- Poor Communication: Enhance communication among team members

Ideal Skills and Experience:
- Proficiency in mobile app development for both iOS and Android
- Experience in UI/UX design for user-friendly interfaces
- Strong background in project management tools and communication platforms
- Knowledge of the trades industry to understand user needs

Please provide a detailed approach, timeline, and budget breakdown.