App Overview

Mammals of North America icon

Mammals of North America

mydigitalearth.com · Reference

The best-selling Princeton field guide to the land and marine mammals of the United States and Canada is now available in digital form on the App Store.

$9.99 · In-app purchases

PRICE
$9.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
2.2
5 ratings · Below Average

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.

Build your own version

Build Kit

Make this idea yours

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

First kit free with a verified email

Add to a Remix

Combine features and design from your favorite apps.

Kit ready. Verify your email to download it.

What's included18 files

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

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
Preview a sample Build Kit No email needed

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.

JavaScript is required to complete mailbox verification.

Free quick prompt For a smaller starting point

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 Mammals of North America: map the core Reference workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

Preview ready. Verify your email to reveal and copy the full prompt.

JavaScript is required to complete mailbox verification. Return to this prompt preview.

Continue in Rork copies the full prompt to your clipboard first, then opens Rork in a new tab.

Continue in Rork >

Affiliate link: CloneChart may earn a commission at no extra cost

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

Include more detailed profiles with interactive elements.

Assumption to check: Limited information on each species

Validate with people who use this workflow before building.

Hypothesis 2

Design a modern, user-friendly interface with better navigation.

Assumption to check: Poor user interface and navigation

Validate with people who use this workflow before building.

Hypothesis 3

Implement a more robust search algorithm and filtering options.

Assumption to check: Inconsistent search results

Validate with people who use this workflow before building.

Hypothesis 4

Add offline capabilities for accessing content without internet.

Assumption to check: No offline mode

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

The best-selling Princeton field guide to the land and marine mammals of the United States and Canada is now available in digital form on the App Store. All the beautiful and accurate illustrations as well as the easy-to-use functionality of the book have been kept while also adding extra features such as: ● The ability to expand the high-resolution images by tapping or rotating the device. ● Photographs that complement the illustrations of certain species. ● Calls for over 150 species (including multiple calls for some species). ● Quick swiping through the 459 mammals. ● The ability to easily find a species using either common or scientific names and in taxonomic or alphabetic order. ● The ability to only show species for a specified postal code. ● A compare feature that lets you view two species at the same time on the same screen. ● Interactive tracks that quickly link to the associated mammal. ● A personal record of mammal sightings that can be exported using email. *Uninstalling/reinstalling the program will result in the loss of your list; it is recommended that you export the list regularly to avoid any loss of data.

Written user reviews are not shown here. Check current App Store reviews >

Screenshots

< Scroll to see more >

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-native-reanimated
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.