App Overview

Birds of Britain Pocket Guide icon

Birds of Britain Pocket Guide

Spiny Software Ltd · Reference

Our apps are British-made, by British naturalists - we know our stuff! Fantastic photos, songs, calls, distribution maps and detailed information for over 200 birds - all the common and best known birds in Britain arr...

$2.99 · In-app purchases

PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
5.0
1 ratings · Top 5%

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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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 Birds of Britain Pocket Guide: 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 offline caching for bird data.

Assumption to check: Limited offline functionality.

Validate with people who use this workflow before building.

Hypothesis 2

Provide extensive details and multimedia content for each bird.

Assumption to check: Not enough detailed information per bird.

Validate with people who use this workflow before building.

Hypothesis 3

Add user forums or species sighting submissions.

Assumption to check: No community features or user engagement.

Validate with people who use this workflow before building.

Hypothesis 4

Clarify paywall and simplify in-app purchase options.

Assumption to check: In-app purchases can be confusing.

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

Our apps are British-made, by British naturalists - we know our stuff! Fantastic photos, songs, calls, distribution maps and detailed information for over 200 birds - all the common and best known birds in Britain arranged by family or alphabetically. The specially written bird notes cover the appearance, habitat, diet, lifespan, nesting habits, rarity status, and distribution in Britain, as well as interesting facts. The photo-based Bird Finder will quickly identify a mystery bird, then you can mark it as seen, add your own photos, and make a note about it. Automatically note the current date, time, latitude, longitude and Grid Reference. The app includes iCloud syncing, so that if you have more than one device (iPhone, iPod or iPad) your sightings will automatically synchronise. "I don't say this often, but you guys should charge more for this neat little piece of work! I almost feel guilty now, for the price!" - AppStore review Great features! This is the ONLY budget British bird app with the following features: • A photo-based BIRD FINDER based on appearance, habitat, location, date and more • Carefully selected photos of MALES, FEMALES and JUVENILES, to show the main features • Labelled photos of KEY FEATURES • A COMPARE IMAGES feature • A SONG or CALL for EVERY BIRD • A HISTORY feature to make it easy to go back to the last bird you looked at • Select the birds for the area WHERE YOU LIVE • European distribution maps for EVERY BIRD • A BACK-UP system so you can save your data • iCLOUD syncing to synchronise your sightings across your devices The Pocket Birds app includes birds that are likely to be seen without making a special trip, plus well-known species. Want more? For the full works, look for Birds of Britain Pro: A Field Guide.

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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
React Native Vector Icons
BUILD KIT DIFFICULTY
Intermediate

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.