I’m building a simple, two-phase tool for my nonprofit’s battery-collection events and I need help finishing the first phase. What the first release must do • Let the user on either iOS or Android snap a photo or choose one from the gallery. • Send that image to a lightweight backend (Node.js or Python—your call) which forwards it to Anthropic’s Claude Vision endpoint. • Return a clear “lithium-ion” or “not lithium-ion” answer to the phone and display it cleanly. • Keep everything self-contained; I don’t want to wire into Zapier, Make.com, or other external integrations right now. Hosting & tech preferences I can supply Claude API keys and credentials for a free hosting tier on Render or Railway, so you’re free to deploy the backend there. The mobile front-end can be native, React Native, Flutter—whatever you’re fastest with, as long as one code-base produces solid iOS and Android builds. Deliverables 1. Source code for the cross-platform mobile app. 2. Backend code with clear README covering environment variables, build, and deploy steps. 3. A brief test plan (manual is fine) showing the image flow working on both platforms. Acceptance criteria • A fresh install on any recent iOS or Android phone opens, takes a photo, and returns the correct binary result in under 10 seconds on Wi-Fi. • Backend deploys on a free Render or Railway account from a clean repo clone with a single command. • All keys, endpoints, and model parameters are pulled from env vars—no secrets hard-coded. Phase two—identifying whether a pictured consumer product contains a lithium-ion battery—will be a follow-up project once this foundation is stable, so clean, well-documented code now will set us up for quick iteration later. If this sounds straightforward, I’m ready to share the API key and hosting credentials so you can get started right away.