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
YumPal - Visual Food Journal
we believe every meal is a small blessing worth remembering
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
3 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'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.
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 YumPal - Visual Food Journal: 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
Incorporate social features for user interaction and meal sharing.
Assumption to check: Lack of user engagement features like comments or sharing meals.
Validate with people who use this workflow before building.
Hypothesis 2
Implement tagging and categorization for better meal organization.
Assumption to check: No option to categorize or tag meals for easier searching.
Validate with people who use this workflow before building.
Hypothesis 3
Offer customizable themes and layouts to enhance user experience.
Assumption to check: Limited customization for journal entries, such as themes or layouts.
Validate with people who use this workflow before building.
Hypothesis 4
Add reminders to encourage users to log their meals regularly.
Assumption to check: No reminder or scheduling feature for logging meals.
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
we believe every meal is a small blessing worth remembering. yumpal is a beautifully designed app dedicated to capturing, cherishing, and reliving your food memories. whether it’s a quick snack or a fine dining experience, yumpal transforms your gallery into a curated timeline of tastes. 【 key features】 visual first design experience your food journey through a stunning timeline. yumpal supports both photos and videos, bringing your memories to life. enjoy full-screen zoom to inspect every delicious detail. smart & effortless logging auto-metadata: automatically detects time to label meals (breakfast, lunch, dinner) and parses gps data to pin the exact location. batch import: easily import hundreds of food photos and videos from your system album in one go. rich details: add moods, tags, and notes to capture the vibe of the moment. whim of fate can't decide what to eat? tap the dice! yumpal randomly selects a card from your past collections. it’s a fun way to rediscover old favorites or get inspired for your next meal. private & personalized privacy focused: your data stays on your device. customization: dark mode support and satisfying haptic feedback for a premium feel. download yumpal today and start building your personal timeline of tastes! made with love for food lovers. privacy policy: https://elevenapril.com/privacy.html terms of use: https://elevenapril.com/terms.html
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
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BUILD KIT DIFFICULTY
Starter
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.
