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
Fork Ranger - sustainable food
Fork Ranger helps you answer two tricky questions:
Free
PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
No overall Grossing estimate available
RATING
★ 4.9
76 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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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 included16 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.
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 Fork Ranger - sustainable food: map the core Food & Drink 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 more robust filtering options such as cuisine type, dietary restrictions, and user ratings.
Assumption to check: Limited search functionality that doesn't allow for advanced filtering.
Validate with people who use this workflow before building.
Hypothesis 2
Add a feature for users to leave reviews and ratings for restaurants.
Assumption to check: Lack of a user review system for restaurants.
Validate with people who use this workflow before building.
Hypothesis 3
Incorporate an order history section where users can view and reorder past meals.
Assumption to check: No in-app ordering history for users.
Validate with people who use this workflow before building.
Hypothesis 4
Optimize image loading and data fetching to improve overall app speed.
Assumption to check: Slow loading times for images and 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
Fork Ranger helps you answer two tricky questions: ‘What can I do about climate change?’ & ‘What’s for dinner?’ WHAT YOU GET: - A new story every day about sustainable food, with a short climate quiz - Infographics about the food system that you unlock as you go - Easy, vegetarian recipes with adjustable portions and step-by-step cooking - A shopping list that combines the ingredients from your recipes - A daily streak to help the habit stick - Home screen widgets for your daily story and a recipe to inspire you - Seasonal information for each recipe and a regional season calendar (paid feature) USE THIS APP FOR: - Eating more plant-based & seasonal - Understanding how to eat sustainably - Discovering new recipes Our recipes are super easy and have lots of veggies. They don’t include complicated ingredients and we always add a source of protein. Become a Fork Ranger Supporter for a small monthly fee and unlock seasonal information for every recipe, in-season filters, bonus questions and the full recipe collection. For more information, visit www.forkranger.com This app offers subscriptions for "Fork Ranger Supporter". Subscriptions will automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period and will be charged to your iTunes account. You can turn off auto-renew/manage subscriptions in your iTunes Account Settings after purchase. Terms of Use and Privacy Policy can be found at https://www.forkranger.com/privacy-policy-fork-ranger-app/ and https://www.apple.com/legal/internet-services/itunes/dev/stdeula/.
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
Axios
Redux
Expo Image Picker
React Native Maps
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.
