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 Birds of East Africa
**Now a universal app - designed for iPad and iPhone/iPod Touch**
$28.99 · In-app purchases
PRICE
$28.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 2.8
12 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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Combine features and design from your favorite apps.
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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 included17 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 Birds of East Africa: 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 extensive details and user-generated content.
Assumption to check: Limited bird information compared to other apps
Validate with people who use this workflow before building.
Hypothesis 2
Implement a more visually appealing design with interactive elements.
Assumption to check: User interface is not engaging
Validate with people who use this workflow before building.
Hypothesis 3
Enhance the navigation structure for easier access to information.
Assumption to check: Difficulties in navigation
Validate with people who use this workflow before building.
Hypothesis 4
Introduce a tiered subscription model for more flexible pricing options.
Assumption to check: High price point for users
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 universal app - designed for iPad and iPhone/iPod Touch** The eGuide to Birds of East Africa is an interactive companion to Terry Stevenson and John Fanshawe's Birds of East Africa field guide – the essential guide for birdwatchers visiting this spectacular region. It covers Kenya, Tanzania, Uganda, Rwanda and Burundi. This application has specific features that will enhance your birding experience. FEATURES: Hi-res images, distribution maps and detailed text descriptions of over 1300 bird species including breeding species and regular visitors. These images can be expanded to fill the entire width of the screen in portrait and landscape. Audible calls for more than 1000 bird species “Bird Compare” that allows you to compare two birds on the same screen. 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 either alphabetically or taxonomically. *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.
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 Native
Expo
Supabase
Axios
React Navigation
React Native Sound
BUILD KIT DIFFICULTY
Expert
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.
