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.
App Overview
eGuide to British Birds
Now a fully universal app! It adjusts to the larger screen of the iPad if installed on an iPad.
$6.99
PRICE
$6.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 1.0
1 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
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A product spec, screen plans, and build steps for your coding agent.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included14 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.
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for eGuide to British Birds: 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
Provide more comprehensive data and user-generated content.
Assumption to check: Limited bird information and images.
Validate with people who use this workflow before building.
Hypothesis 2
Focus on enhancing UI/UX design and performance.
Assumption to check: Poor user ratings indicating usability issues.
Validate with people who use this workflow before building.
Hypothesis 3
Implement offline caching for bird information.
Assumption to check: No offline access to content.
Validate with people who use this workflow before building.
Hypothesis 4
Add interactive learning features to engage users.
Assumption to check: Lack of interactive features like quizzes or games.
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
Now a fully universal app! It adjusts to the larger screen of the iPad if installed on an iPad. The eGuide to British Birds is an interactive companion to The RSPB Handbook of British Birds – the ideal reference for birdwatchers of all levels of interest and experience. This application has specific features that will enhance your birding experience. FEATURES: Hi-res images, distribution maps and detailed text descriptions of over 290 bird species found in Britain and Ireland. These images can be expanded to fill the entire width of the screen in portrait and landscape. Audible calls for most bird species. “Bird Compare” to allow you to compare two birds on the same screen (including calls). A personal bird list that stores your bird sightings saved to the device that can then be exported through email. View the Bird Index by Common or Scientific bird names. *Uninstalling the program will result in the loss of your list, it is recommended that you keep your own master list separate from the program. NB. This Application WILL ONLY work on an iPhone, iPod Touch and iPad running OS V8.4 or higher NOT A NORMAL IPOD CLASSIC/NANO.
Written user reviews are not shown here. Check current App Store reviews >
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 Navigation
Expo AV
Axios
Zustand
React Native
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.
