App Overview

eBird icon

eBird

Cornell University · Reference

eBird Mobile makes it easy to record the birds you see in the field, and seamlessly link these observations with eBird--a global online database of bird records used by hundreds of thousands of birders around the world

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
3.8
793 ratings · Top 50%

Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.

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A product spec, screen plans, and build steps for your coding agent.

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What's included17 files

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

Feature spec

Goal: Send a clear invoice after finishing a job.

  • Add a client, line items, a due date, and payment instructions.
  • Preview the total before exporting a PDF.
  • Keep an editable draft if export fails.

Screen plan

Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.

States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.

Differentiate and validate

Hypothesis: Contractors need faster repeat invoices more than more templates.

First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.

The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.

Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.

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Quick prompt

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for eBird: map the core Reference workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

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Opportunities

AI-GENERATED OPPORTUNITY HYPOTHESES

These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.

Hypothesis 1

Implement real-time validation and suggestions based on location.

Assumption to check: Inconsistent data accuracy in user submissions

Validate with people who use this workflow before building.

Hypothesis 2

Add social sharing and community features.

Assumption to check: Limited user engagement features

Validate with people who use this workflow before building.

Hypothesis 3

Improve onboarding with guided tutorials.

Assumption to check: Difficult navigation for new users

Validate with people who use this workflow before building.

Hypothesis 4

Implement caching for offline viewing of birding locations.

Assumption to check: Lack of offline access to data

Validate with people who use this workflow before building.

App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

App Store description

eBird Mobile makes it easy to record the birds you see in the field, and seamlessly link these observations with eBird--a global online database of bird records used by hundreds of thousands of birders around the world. This free resource makes it easy to keep track of what you see, while making your data openly available for scientific research, education, and conservation. eBird Mobile is the only app that passes information directly from the iOS device to your eBird account on the web. Features - Enter bird observations from any location around the world. - Full global taxonomy based on The Clements Checklist of Birds of the World. - Common names available in local languages (e.g., Portuguese names in Brazil or in Portugal). - Checklists customized for your location and time of year, showing most likely species based on eBird data. - Rare species flagged during data entry and on the checklist. - "Record as you go" functionality for incremental list keeping and counting while birding. - GPS enabled location plotting to ensure accuracy. - Map tools that enable selecting from hundreds of thousands of eBird "Hotspots." - Full offline functionality, enabling use in places with limited or no Internet connection. - Trip and Day list functionality that makes it easy to keep track of your species list on a particular outing. - Support for iPhone, iPad, and iPod Touch. - Entire app translated to German, Mandarin, French, Spanish, Portuguese (Brazil), Turkish, and Dutch.

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Screenshots

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Build scope

Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.

Define the first version

Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.

Set boundaries

Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.

Check the hard parts

Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.

SUGGESTED BUILD STACK
React Native
Expo
Supabase
Zustand
React Navigation
Expo Location
BUILD KIT DIFFICULTY
Advanced

From the Build Kit assessment.

A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.